短语词组短语Electric actuator for knife -gate valve 电气刀门执行器阀门Mannual knife gate valve 样品名称electric knife gate valve 电动刀型闸阀Pneumatic Knife Gate Valve 气动刀闸阀Knife Gate Valve - ORBINOX 刀闸阀Knife -shaped gate valve 刀型闸阀 返回 knife gate valve