短語詞組短語face seal seal joint 端面密封密封連接dual face mechanical seal 雙端面機(jī)械密封dual end face mechanical seal 雙端面機(jī)械密封single end face mechanical seal 單端面機(jī)械密封face seal tee 端面密封三通carbon face seal 炭面密封Metal face seal 金屬端面密封Inboard face seal lubrication 內(nèi)端面密封潤滑oil film face seal 端面油膜密封 返回 face seal