英语词汇“bit under-reaming”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	bit under-reaming
释义	bit under-reaming 扩底钻头
随便看	collimation efficiency collimation equipment collimation error collimation extension bars Collimation fiber sensor collimation instrument collimation lens collimation level collimation line collimation line method collimation long-base method collimation mark collimation method collimation objective collimation plane collimation ratio collimations collimation system collimation technique collimation tower collimator collimator and autocollimator collimator apparatus collimator distance collimator effect