downhole safety valve 中文意思是什麼
downhole safety valve
解釋
井下安全閥-
Petroleum and natural gas industries - downhole equipment - subsurface safety valve equipment
石油和天然氣工業.下降孔設備.地下安全閥設備 -
Petroleum and natural gas industries - downhole equipment - subsurface safety valve equipment iso 10432 : 2004 ; english version en iso 10432 : 2004
石油和天然氣工業.下降孔設備.地下安全閥設備
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