... casing tying machine 肠衣结扎机 casing valve 套管阀 casing well tester 套管井地层测试器 ...
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valve casing 阀箱 ; 阀体 ; 阀门罩
casing check valve 套管止回阀
casing float valve 套管浮阀
inlet valve casing 进气阀壳
casing of safety valve 安全阀壳
slide valve casing 滑阀箱
exhaust valve casing 排气阀壳
valve casing cover 阀箱盖
casing by-pass valve [油气] 套管旁通阀
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