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旋转防喷器
dril. rotating blowout preventer
oil rotating heads; revolving blow-out preventer; rotary blowout preventer
海德里尔旋转防喷器
dril. Hydril-type preventer
海德里尔，美国公司名旋转防喷器简称
dril. Hydril
旋 转 防喷器
: 3 phrases in 2 subjects
Drilling2
Technology1

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