pre ure difference tra ducer 压差传感器 ; 压差变换器

pre ure difference tra mitter 压差变送器

aperture of pre ure difference 压差光阑

pre ure difference indication controller 压差指示控制器

pre ure difference switch 压差开关

pre ure difference indicator 压差指示器

mercury difference-pre ure meter 水银差压计

precision difference pre ure gauge 精细差压计

difference in pre ure 压力差