短語詞組短語high pressure hermetic seal 加壓密封medium pressure mechanical seal 中壓機(jī)械密封weak pressure gas seal 微壓氣體密封high pressure oil seal 高壓油封pressure energized seal 自緊密封pressure -seal joint 壓緊密封連接high pressure static seal 高壓靜密封pressure e seal 壓力封閉high pressure mechanical seal 高壓機(jī)械密封 返回 pressure seal