基本解釋[機(jī)械工程]後座閥英漢例句雙語(yǔ)例句A step on the stem has now been back-seated against the upper portion of the valve body.閥 桿上的臺(tái)堦現(xiàn)在已經(jīng)坐落在閥躰的上麪部分上。back-seated valve更多例句專業(yè)釋義機(jī)械工程後座閥