1 Introduction to Research & Analysis Reports
1.1 Mud Balance Market Definition
1.2 Market Segments
1.2.1 Market by Type
1.2.2 Market by Application
1.3 Global Mud Balance Market Overview
1.4 Features & Benefits of This Report
1.5 Methodology & Sources of Information
1.5.1 Research Methodology
1.5.2 Research Process
1.5.3 Base Year
1.5.4 Report Assumptions & Caveats
2 Global Mud Balance Overall Market Size
2.1 Global Mud Balance Market Size: 2022 VS 2029
2.2 Global Mud Balance Revenue, Prospects & Forecasts: 2018-2029
2.3 Global Mud Balance Sales: 2018-2029
3 Company Landscape
3.1 Top Mud Balance Players in Global Market
3.2 Top Global Mud Balance Companies Ranked by Revenue
3.3 Global Mud Balance Revenue by Companies
3.4 Global Mud Balance Sales by Companies
3.5 Global Mud Balance Price by Manufacturer (2018-2023)
3.6 Top 3 and Top 5 Mud Balance Companies in Global Market, by Revenue in 2022
3.7 Global Manufacturers Mud Balance Product Type
3.8 Tier 1, Tier 2 and Tier 3 Mud Balance Players in Global Market
3.8.1 List of Global Tier 1 Mud Balance Companies
3.8.2 List of Global Tier 2 and Tier 3 Mud Balance Companies
4 Sights by Product
4.1 Overview
4.1.1 By Type – Global Mud Balance Market Size Markets, 2022 & 2029
4.1.2 Plastic Type
4.1.3 Stainless Steel Type
4.1.4 Other
4.2 By Type – Global Mud Balance Revenue & Forecasts
4.2.1 By Type – Global Mud Balance Revenue, 2018-2023
4.2.2 By Type – Global Mud Balance Revenue, 2024-2029
4.2.3 By Type – Global Mud Balance Revenue Market Share, 2018-2029
4.3 By Type – Global Mud Balance Sales & Forecasts
4.3.1 By Type – Global Mud Balance Sales, 2018-2023
4.3.2 By Type – Global Mud Balance Sales, 2024-2029
4.3.3 By Type – Global Mud Balance Sales Market Share, 2018-2029
4.4 By Type – Global Mud Balance Price (Manufacturers Selling Prices), 2018-2029
5 Sights by Application
5.1 Overview
5.1.1 By Application – Global Mud Balance Market Size, 2022 & 2029
5.1.2 Drilling Fluids
5.1.3 Oil Well Cement
5.1.4 Other
5.2 By Application – Global Mud Balance Revenue & Forecasts
5.2.1 By Application – Global Mud Balance Revenue, 2018-2023
5.2.2 By Application – Global Mud Balance Revenue, 2024-2029
5.2.3 By Application – Global Mud Balance Revenue Market Share, 2018-2029
5.3 By Application – Global Mud Balance Sales & Forecasts
5.3.1 By Application – Global Mud Balance Sales, 2018-2023
5.3.2 By Application – Global Mud Balance Sales, 2024-2029
5.3.3 By Application – Global Mud Balance Sales Market Share, 2018-2029
5.4 By Application – Global Mud Balance Price (Manufacturers Selling Prices), 2018-2029
6 Sights by Region
6.1 By Region – Global Mud Balance Market Size, 2022 & 2029
6.2 By Region – Global Mud Balance Revenue & Forecasts
6.2.1 By Region – Global Mud Balance Revenue, 2018-2023
6.2.2 By Region – Global Mud Balance Revenue, 2024-2029
6.2.3 By Region – Global Mud Balance Revenue Market Share, 2018-2029
6.3 By Region – Global Mud Balance Sales & Forecasts
6.3.1 By Region – Global Mud Balance Sales, 2018-2023
6.3.2 By Region – Global Mud Balance Sales, 2024-2029
6.3.3 By Region – Global Mud Balance Sales Market Share, 2018-2029
6.4 North America
6.4.1 By Country – North America Mud Balance Revenue, 2018-2029
6.4.2 By Country – North America Mud Balance Sales, 2018-2029
6.4.3 US Mud Balance Market Size, 2018-2029
6.4.4 Canada Mud Balance Market Size, 2018-2029
6.4.5 Mexico Mud Balance Market Size, 2018-2029
6.5 Europe
6.5.1 By Country – Europe Mud Balance Revenue, 2018-2029
6.5.2 By Country – Europe Mud Balance Sales, 2018-2029
6.5.3 Germany Mud Balance Market Size, 2018-2029
6.5.4 France Mud Balance Market Size, 2018-2029
6.5.5 U.K. Mud Balance Market Size, 2018-2029
6.5.6 Italy Mud Balance Market Size, 2018-2029
6.5.7 Russia Mud Balance Market Size, 2018-2029
6.5.8 Nordic Countries Mud Balance Market Size, 2018-2029
6.5.9 Benelux Mud Balance Market Size, 2018-2029
6.6 Asia
6.6.1 By Region – Asia Mud Balance Revenue, 2018-2029
6.6.2 By Region – Asia Mud Balance Sales, 2018-2029
6.6.3 China Mud Balance Market Size, 2018-2029
6.6.4 Japan Mud Balance Market Size, 2018-2029
6.6.5 South Korea Mud Balance Market Size, 2018-2029
6.6.6 Southeast Asia Mud Balance Market Size, 2018-2029
6.6.7 India Mud Balance Market Size, 2018-2029
6.7 South America
6.7.1 By Country – South America Mud Balance Revenue, 2018-2029
6.7.2 By Country – South America Mud Balance Sales, 2018-2029
6.7.3 Brazil Mud Balance Market Size, 2018-2029
6.7.4 Argentina Mud Balance Market Size, 2018-2029
6.8 Middle East & Africa
6.8.1 By Country – Middle East & Africa Mud Balance Revenue, 2018-2029
6.8.2 By Country – Middle East & Africa Mud Balance Sales, 2018-2029
6.8.3 Turkey Mud Balance Market Size, 2018-2029
6.8.4 Israel Mud Balance Market Size, 2018-2029
6.8.5 Saudi Arabia Mud Balance Market Size, 2018-2029
6.8.6 UAE Mud Balance Market Size, 2018-2029
7 Manufacturers & Brands Profiles
7.1 Fann Instrument Company
7.1.1 Fann Instrument Company Company Summary
7.1.2 Fann Instrument Company Business Overview
7.1.3 Fann Instrument Company Mud Balance Major Product Offerings
7.1.4 Fann Instrument Company Mud Balance Sales and Revenue in Global (2018-2023)
7.1.5 Fann Instrument Company Key News & Latest Developments
7.2 LEUTERT
7.2.1 LEUTERT Company Summary
7.2.2 LEUTERT Business Overview
7.2.3 LEUTERT Mud Balance Major Product Offerings
7.2.4 LEUTERT Mud Balance Sales and Revenue in Global (2018-2023)
7.2.5 LEUTERT Key News & Latest Developments
7.3 Matest
7.3.1 Matest Company Summary
7.3.2 Matest Business Overview
7.3.3 Matest Mud Balance Major Product Offerings
7.3.4 Matest Mud Balance Sales and Revenue in Global (2018-2023)
7.3.5 Matest Key News & Latest Developments
7.4 Test Mark Industries
7.4.1 Test Mark Industries Company Summary
7.4.2 Test Mark Industries Business Overview
7.4.3 Test Mark Industries Mud Balance Major Product Offerings
7.4.4 Test Mark Industries Mud Balance Sales and Revenue in Global (2018-2023)
7.4.5 Test Mark Industries Key News & Latest Developments
7.5 Innova Corporate
7.5.1 Innova Corporate Company Summary
7.5.2 Innova Corporate Business Overview
7.5.3 Innova Corporate Mud Balance Major Product Offerings
7.5.4 Innova Corporate Mud Balance Sales and Revenue in Global (2018-2023)
7.5.5 Innova Corporate Key News & Latest Developments
7.6 OFITE
7.6.1 OFITE Company Summary
7.6.2 OFITE Business Overview
7.6.3 OFITE Mud Balance Major Product Offerings
7.6.4 OFITE Mud Balance Sales and Revenue in Global (2018-2023)
7.6.5 OFITE Key News & Latest Developments
7.7 MATRIX Construction Products
7.7.1 MATRIX Construction Products Company Summary
7.7.2 MATRIX Construction Products Business Overview
7.7.3 MATRIX Construction Products Mud Balance Major Product Offerings
7.7.4 MATRIX Construction Products Mud Balance Sales and Revenue in Global (2018-2023)
7.7.5 MATRIX Construction Products Key News & Latest Developments
7.8 OFI Testing Equipment (OFITE)
7.8.1 OFI Testing Equipment (OFITE) Company Summary
7.8.2 OFI Testing Equipment (OFITE) Business Overview
7.8.3 OFI Testing Equipment (OFITE) Mud Balance Major Product Offerings
7.8.4 OFI Testing Equipment (OFITE) Mud Balance Sales and Revenue in Global (2018-2023)
7.8.5 OFI Testing Equipment (OFITE) Key News & Latest Developments
8 Global Mud Balance Production Capacity, Analysis
8.1 Global Mud Balance Production Capacity, 2018-2029
8.2 Mud Balance Production Capacity of Key Manufacturers in Global Market
8.3 Global Mud Balance Production by Region
9 Key Market Trends, Opportunity, Drivers and Restraints
9.1 Market Opportunities & Trends
9.2 Market Drivers
9.3 Market Restraints
10 Mud Balance Supply Chain Analysis
10.1 Mud Balance Industry Value Chain
10.2 Mud Balance Upstream Market
10.3 Mud Balance Downstream and Clients
10.4 Marketing Channels Analysis
10.4.1 Marketing Channels
10.4.2 Mud Balance Distributors and Sales Agents in Global
11 Conclusion
12 Appendix
12.1 Note
12.2 Examples of Clients
12.3 Disclaimer
Table 1. Key Players of Mud Balance in Global Market
Table 2. Top Mud Balance Players in Global Market, Ranking by Revenue (2022)
Table 3. Global Mud Balance Revenue by Companies, (US$, Mn), 2018-2023
Table 4. Global Mud Balance Revenue Share by Companies, 2018-2023
Table 5. Global Mud Balance Sales by Companies, (K Units), 2018-2023
Table 6. Global Mud Balance Sales Share by Companies, 2018-2023
Table 7. Key Manufacturers Mud Balance Price (2018-2023) & (US$/Unit)
Table 8. Global Manufacturers Mud Balance Product Type
Table 9. List of Global Tier 1 Mud Balance Companies, Revenue (US$, Mn) in 2022 and Market Share
Table 10. List of Global Tier 2 and Tier 3 Mud Balance Companies, Revenue (US$, Mn) in 2022 and Market Share
Table 11. By Type – Global Mud Balance Revenue, (US$, Mn), 2022 & 2029
Table 12. By Type - Global Mud Balance Revenue (US$, Mn), 2018-2023
Table 13. By Type - Global Mud Balance Revenue (US$, Mn), 2024-2029
Table 14. By Type - Global Mud Balance Sales (K Units), 2018-2023
Table 15. By Type - Global Mud Balance Sales (K Units), 2024-2029
Table 16. By Application – Global Mud Balance Revenue, (US$, Mn), 2022 & 2029
Table 17. By Application - Global Mud Balance Revenue (US$, Mn), 2018-2023
Table 18. By Application - Global Mud Balance Revenue (US$, Mn), 2024-2029
Table 19. By Application - Global Mud Balance Sales (K Units), 2018-2023
Table 20. By Application - Global Mud Balance Sales (K Units), 2024-2029
Table 21. By Region – Global Mud Balance Revenue, (US$, Mn), 2022 VS 2029
Table 22. By Region - Global Mud Balance Revenue (US$, Mn), 2018-2023
Table 23. By Region - Global Mud Balance Revenue (US$, Mn), 2024-2029
Table 24. By Region - Global Mud Balance Sales (K Units), 2018-2023
Table 25. By Region - Global Mud Balance Sales (K Units), 2024-2029
Table 26. By Country - North America Mud Balance Revenue, (US$, Mn), 2018-2023
Table 27. By Country - North America Mud Balance Revenue, (US$, Mn), 2024-2029
Table 28. By Country - North America Mud Balance Sales, (K Units), 2018-2023
Table 29. By Country - North America Mud Balance Sales, (K Units), 2024-2029
Table 30. By Country - Europe Mud Balance Revenue, (US$, Mn), 2018-2023
Table 31. By Country - Europe Mud Balance Revenue, (US$, Mn), 2024-2029
Table 32. By Country - Europe Mud Balance Sales, (K Units), 2018-2023
Table 33. By Country - Europe Mud Balance Sales, (K Units), 2024-2029
Table 34. By Region - Asia Mud Balance Revenue, (US$, Mn), 2018-2023
Table 35. By Region - Asia Mud Balance Revenue, (US$, Mn), 2024-2029
Table 36. By Region - Asia Mud Balance Sales, (K Units), 2018-2023
Table 37. By Region - Asia Mud Balance Sales, (K Units), 2024-2029
Table 38. By Country - South America Mud Balance Revenue, (US$, Mn), 2018-2023
Table 39. By Country - South America Mud Balance Revenue, (US$, Mn), 2024-2029
Table 40. By Country - South America Mud Balance Sales, (K Units), 2018-2023
Table 41. By Country - South America Mud Balance Sales, (K Units), 2024-2029
Table 42. By Country - Middle East & Africa Mud Balance Revenue, (US$, Mn), 2018-2023
Table 43. By Country - Middle East & Africa Mud Balance Revenue, (US$, Mn), 2024-2029
Table 44. By Country - Middle East & Africa Mud Balance Sales, (K Units), 2018-2023
Table 45. By Country - Middle East & Africa Mud Balance Sales, (K Units), 2024-2029
Table 46. Fann Instrument Company Company Summary
Table 47. Fann Instrument Company Mud Balance Product Offerings
Table 48. Fann Instrument Company Mud Balance Sales (K Units), Revenue (US$, Mn) and Average Price (US$/Unit) (2018-2023)
Table 49. Fann Instrument Company Key News & Latest Developments
Table 50. LEUTERT Company Summary
Table 51. LEUTERT Mud Balance Product Offerings
Table 52. LEUTERT Mud Balance Sales (K Units), Revenue (US$, Mn) and Average Price (US$/Unit) (2018-2023)
Table 53. LEUTERT Key News & Latest Developments
Table 54. Matest Company Summary
Table 55. Matest Mud Balance Product Offerings
Table 56. Matest Mud Balance Sales (K Units), Revenue (US$, Mn) and Average Price (US$/Unit) (2018-2023)
Table 57. Matest Key News & Latest Developments
Table 58. Test Mark Industries Company Summary
Table 59. Test Mark Industries Mud Balance Product Offerings
Table 60. Test Mark Industries Mud Balance Sales (K Units), Revenue (US$, Mn) and Average Price (US$/Unit) (2018-2023)
Table 61. Test Mark Industries Key News & Latest Developments
Table 62. Innova Corporate Company Summary
Table 63. Innova Corporate Mud Balance Product Offerings
Table 64. Innova Corporate Mud Balance Sales (K Units), Revenue (US$, Mn) and Average Price (US$/Unit) (2018-2023)
Table 65. Innova Corporate Key News & Latest Developments
Table 66. OFITE Company Summary
Table 67. OFITE Mud Balance Product Offerings
Table 68. OFITE Mud Balance Sales (K Units), Revenue (US$, Mn) and Average Price (US$/Unit) (2018-2023)
Table 69. OFITE Key News & Latest Developments
Table 70. MATRIX Construction Products Company Summary
Table 71. MATRIX Construction Products Mud Balance Product Offerings
Table 72. MATRIX Construction Products Mud Balance Sales (K Units), Revenue (US$, Mn) and Average Price (US$/Unit) (2018-2023)
Table 73. MATRIX Construction Products Key News & Latest Developments
Table 74. OFI Testing Equipment (OFITE) Company Summary
Table 75. OFI Testing Equipment (OFITE) Mud Balance Product Offerings
Table 76. OFI Testing Equipment (OFITE) Mud Balance Sales (K Units), Revenue (US$, Mn) and Average Price (US$/Unit) (2018-2023)
Table 77. OFI Testing Equipment (OFITE) Key News & Latest Developments
Table 78. Mud Balance Production Capacity (K Units) of Key Manufacturers in Global Market, 2021-2023 (K Units)
Table 79. Global Mud Balance Capacity Market Share of Key Manufacturers, 2021-2023
Table 80. Global Mud Balance Production by Region, 2018-2023 (K Units)
Table 81. Global Mud Balance Production by Region, 2024-2029 (K Units)
Table 82. Mud Balance Market Opportunities & Trends in Global Market
Table 83. Mud Balance Market Drivers in Global Market
Table 84. Mud Balance Market Restraints in Global Market
Table 85. Mud Balance Raw Materials
Table 86. Mud Balance Raw Materials Suppliers in Global Market
Table 87. Typical Mud Balance Downstream
Table 88. Mud Balance Downstream Clients in Global Market
Table 89. Mud Balance Distributors and Sales Agents in Global Market
List of Figures
Figure 1. Mud Balance Segment by Type in 2022
Figure 2. Mud Balance Segment by Application in 2022
Figure 3. Global Mud Balance Market Overview: 2022
Figure 4. Key Caveats
Figure 5. Global Mud Balance Market Size: 2022 VS 2029 (US$, Mn)
Figure 6. Global Mud Balance Revenue, 2018-2029 (US$, Mn)
Figure 7. Mud Balance Sales in Global Market: 2018-2029 (K Units)
Figure 8. The Top 3 and 5 Players Market Share by Mud Balance Revenue in 2022
Figure 9. By Type - Global Mud Balance Revenue, (US$, Mn), 2022 & 2029
Figure 10. By Type - Global Mud Balance Revenue Market Share, 2018-2029
Figure 11. By Type - Global Mud Balance Sales Market Share, 2018-2029
Figure 12. By Type - Global Mud Balance Price (US$/Unit), 2018-2029
Figure 13. By Application - Global Mud Balance Revenue, (US$, Mn), 2022 & 2029
Figure 14. By Application - Global Mud Balance Revenue Market Share, 2018-2029
Figure 15. By Application - Global Mud Balance Sales Market Share, 2018-2029
Figure 16. By Application - Global Mud Balance Price (US$/Unit), 2018-2029
Figure 17. By Region - Global Mud Balance Revenue, (US$, Mn), 2022 & 2029
Figure 18. By Region - Global Mud Balance Revenue Market Share, 2018 VS 2022 VS 2029
Figure 19. By Region - Global Mud Balance Revenue Market Share, 2018-2029
Figure 20. By Region - Global Mud Balance Sales Market Share, 2018-2029
Figure 21. By Country - North America Mud Balance Revenue Market Share, 2018-2029
Figure 22. By Country - North America Mud Balance Sales Market Share, 2018-2029
Figure 23. US Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 24. Canada Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 25. Mexico Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 26. By Country - Europe Mud Balance Revenue Market Share, 2018-2029
Figure 27. By Country - Europe Mud Balance Sales Market Share, 2018-2029
Figure 28. Germany Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 29. France Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 30. U.K. Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 31. Italy Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 32. Russia Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 33. Nordic Countries Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 34. Benelux Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 35. By Region - Asia Mud Balance Revenue Market Share, 2018-2029
Figure 36. By Region - Asia Mud Balance Sales Market Share, 2018-2029
Figure 37. China Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 38. Japan Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 39. South Korea Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 40. Southeast Asia Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 41. India Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 42. By Country - South America Mud Balance Revenue Market Share, 2018-2029
Figure 43. By Country - South America Mud Balance Sales Market Share, 2018-2029
Figure 44. Brazil Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 45. Argentina Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 46. By Country - Middle East & Africa Mud Balance Revenue Market Share, 2018-2029
Figure 47. By Country - Middle East & Africa Mud Balance Sales Market Share, 2018-2029
Figure 48. Turkey Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 49. Israel Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 50. Saudi Arabia Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 51. UAE Mud Balance Revenue, (US$, Mn), 2018-2029
Figure 52. Global Mud Balance Production Capacity (K Units), 2018-2029
Figure 53. The Percentage of Production Mud Balance by Region, 2022 VS 2029
Figure 54. Mud Balance Industry Value Chain
Figure 55. Marketing Channels
※参考情報 マッドバランスの概念は、特に掘削業界において重要な役割を果たしています。主に石油や天然ガスの採掘が行われる際に用いられる技術であり、その目的は掘削時の泥(マッド)の特性を正確に把握することにあります。マッドバランスは、掘削流体(ドリリングフルード)の密度や特性を測定し、掘削作業の効率や安全性を向上させるために非常に重要です。 まず、マッドバランスの定義について述べます。マッドバランスとは、掘削に使用される泥の比重を測定する器具を指します。この器具は、掘削作業において使用される流体の正確な特性分析を可能にし、掘削イベントの様々な場面で必要となります。掘削フルードはその性質上、採掘される鉱物や石油の種類、地質環境によって変わるため、適切な管理が不可欠です。 次に、マッドバランスの特徴を見ていきます。この器具の主な特徴は、精度の高い比重測定ができる点です。比較的シンプルなデザインであるため、現場での取り扱いが容易であり、結果が迅速に出ることが求められる状況において大きな利点となります。また、マッドバランスは耐久性にも優れており、過酷な環境条件でも安定した性能を発揮します。 マッドバランスにはいくつかの種類が存在します。最も一般的なものは、標準的なマッドバランスであり、液体のサンプルを取り、内部の空気圧と流体の比重を比較することで測定します。さらに、高精度な測定が求められる場合にはデジタルマッドバランスが使用されます。これらは自動的にデータを収集し、ディスプレイ上で表示するとともに、データロギング機能を持ち、長期間のデータ保存が可能です。これにより、傾向を把握し、掘削プロセスを最適化することができます。 マッドバランスの用途は多岐にわたります。掘削現場におけるリアルタイムでの泥の特性の把握はもちろんですが、マッドバランスを用いた測定結果は、掘削コストの削減や事前の計画立案にも寄与します。また、環境保護の観点からも、掘削に使用される流体の特性を把握することで、環境汚染のリスクを軽減することができます。 関連技術としては、掘削フルードの処理技術や、フルードの性質をモニタリングするためのセンサー技術が挙げられます。これらの技術は、マッドバランスとの連携によってきわめて重要な役割を果たします。また、デジタル技術の進化により、IoTを活用したマッドバランスの運用が進んでおり、遠隔地からでもリアルタイムでデータを監視・分析することが可能になっています。これにより、技術者は迅速な判断を下すことができ、掘削作業の効率を一層向上させることが期待されています。 このように、マッドバランスは掘削業界における基本的なツールとして、常に高い需要があります。その重要性は日々増しており、より高精度な測定機器や関連技術の開発が進められています。また、環境問題への配慮が求められる現代においては、マッドバランスの役割は今後ますます重要になってくるでしょう。掘削効率と環境保護を両立させるために、マッドバランスのさらなる進化が期待されています。 掘削作業においては、現場での迅速な反応が求められるため、マッドバランスの性能や信頼性はそのまま作業の成果に直結します。このことから、技術者たちは常に最新の情報、手法を取り入れ、より良い掘削作業の実現に向け努力を続けているのです。将来的には、より自動化が進み、精度や効率が向上することで、掘削業界がより持続可能な方向に向かうことでしょう。 以上のように、マッドバランスは掘削業界において不可欠なツールであり、その機能や関連技術も日進月歩で進化しています。この背景を理解し、掘削作業の場で最大限の性能を発揮できるような運用が求められています。マッドバランスのさらなる発展が、地域社会や環境への配慮を重要視した採掘活動において、今後の重要な要素となるでしょう。 |
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