短語(yǔ)詞組短語(yǔ)diaphragm -seal pipeline clamping 膜片密封管道夾持diaphragm m seal flowmeter 膜片式密封流量計(jì)diaphragm steam seal gland 隔板汽封reservoir diaphragm cover seal 水庫(kù)diaphragm labyrinth seal 隔板汽封Diaphragm -seal manometer 隔膜壓力表 返回 diaphragm seal