短語詞組短語Stem -Seal-Ring 閥桿密封圈valve stem seal 氣門油封;密封活塞桿STEM SEAL VALVE 氣門油封lower stem seal 下閥桿密封stomvery single stem seal 本體閥桿密封STEM PACKING or SEAL 填料或密封Stem Seal & Type 桿密封材質(zhì)及類型body stem seal 本體閥桿密封;本體閥桿彌縫;閥桿密封guide vane stem seal 導(dǎo)葉軸密封 返回 stem seal