GB/T 41163-2021
煤矿井下煤层水射流冲击增透工艺设计规范
Specification for process design of enhancing coal seam permeability by water jet in coalmine
- 实施日期
- 2022-07-01
- ICS 分类
- 73.020
组合使用关键词、标准类型、状态与 ICS 分类,快速定位所需国家标准。
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GB/T 41163-2021
Specification for process design of enhancing coal seam permeability by water jet in coalmine
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Arc welding equipment—Part 14: Calibration, validation and consistency testing
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Coordinative development effectiveness evaluation indicator and method of coal and coalbed methane
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Fasteners—Non-electrolytically applied zinc flake coatings
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Terminology of fasteners—Control, inspection, delivery, acceptance and quality