短语词组短語Electric actuator for knife -gate valve 電氣刀門執行器閥門Mannual knife gate valve 樣品名稱electric knife gate valve 電動刀型牐閥Pneumatic Knife Gate Valve 氣動刀牐閥Knife Gate Valve - ORBINOX 刀牐閥Knife -shaped gate valve 刀型牐閥 返回 knife gate valve