短語詞組短語hermetic or seal 氣密性hermetic c seal 密封hermetic -seal relay [電]封閉型繼電器hermetic shaft seal 軸頸密封hermetic seal furnace 氣密封爐hermetic seal machine 氣密封機(jī)hermetic seal form 密封的形式hermetic seal leakage 密封泄漏high pressure hermetic seal 加壓密封 返回 hermetic seal