“正压”的拼音？

消防员须身穿保护装置及正压呼吸设施.Firemen should wear proper protective equipment and positive pressure self - contained breathing apparatus.可以工作在正压或负压下, 简单的螺丝刀调节, 多种弹簧可选.They work under pressure or suction. Simple screwdriver adjustmen...

“正压”的英语可以翻译为：malleation，positive voltage，positive pressure，barotropy ...