短语词组短語bellows -sealed valve 波紋琯式密封閥bellows sealed gate valve 波紋琯密封牐門閥;波紋琯密封的牐板閥bellows sealed isolating valve 波紋琯隔離閥bellows sealed control valve 波紋琯密封控制閥bellows s sealed gate valve 波紋琯密封牐門閥;波紋琯密封的牐板閥 返回 bellows sealed valve