英语词汇“bumper jar”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	bumper jar
释义	bumper jar bumper jar [′bəm·pər ‚jär] (petroleum engineering) An expansion joint installed on the drill stem of a floating offshore drilling rig, permitting vertical movement of the upper section while the lower section of the tool remains stationary.
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