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Terms
for subject
Drilling
containing
流形
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all forms
Chinese
English
钻杆接头
双流线形
double streamline
U形流体压力计
U-type manometer
球形单流浮箍
套管下部结构
ball float collar
球形单流阀
ball and seat valve
球形单流阀
ball and seat
球形截流阀
ball check
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