短語詞組短語bellows gas meter [儀]膜盒式氣量計bellows s meter 皮囊流量計bellows -type gas or orifice meter 伸縮式氣體孔板流量計bellows differential flow meter 膜盒式差壓流量計bellows s gas meter 膜盒式氣量計 返回 bellows meter