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- API Spec 7-1997 Specification for Rotary Drill Stem Elements
【国外标准】 Specification for Rotary Drill Stem Elements
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2025-04-30
- API Spec 7-1997
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标准号：
API Spec 7-1997
标准名称：
Specification for Rotary Drill Stem Elements
英文名称：
标准状态：
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