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井口油嘴
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Subject
Chinese
English
mining.
井口
上部
油嘴
top choke
oil
井口油嘴
top choke
oil
井口油嘴
wellhead restriction
mining.
井口油嘴
节流器
top hole choke
mining.
井口油嘴
和井底油嘴
top and bottom chokes
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