... 3) the surface condition of the gas-liquid filter: flat type network surface and pressed into a ... the range of gas-liquid filter: 40mm, 80mm, 100mm, 150mm, 200mm, 300mm, 400,500 mm, 600mm, etc. ... The standard provides for three types of gas-liquid filter that standard, ... Specification 40-100 60-150 105-300 140-400 160-4002) the efficiency specifications 60-100 80 ...