venturi面罩,venturi面罩 文丘里

adjustable venturi mask
4,venturi面罩
还会用到的面罩有venturi面罩(文丘里面罩),具体原理不做介绍.
venturi mask / oxygen 1060080, 1024080, 1040080, 1035080
the venturi mask, also known as an air-entrainment mask, is a