基本解释[機械工程]閥芯螺母英汉例句雙語例句The pressure regulating valve is composed of a valve seat, a valve core, a spring and a nut.機油壓力指示閥和調壓閥二閥共爲一 個閥腔。ip.comvalve core nut更多例句专业释义機械工程閥芯螺母