短语词组短语bellows -sealed valve 波纹管式密封阀bellows sealed gate valve 波纹管密封闸门阀;波纹管密封的闸板阀bellows sealed isolating valve 波纹管隔离阀bellows sealed control valve 波纹管密封控制阀bellows s sealed gate valve 波纹管密封闸门阀;波纹管密封的闸板阀 返回 bellows sealed valve