... resistance, sewage and convenient, can be used for water, steam, oil, nitric acid, urea, oxidation of medium and other media. According ... mesh, mesh ventilation for the 40-100 mesh, through the oil net goal for the 100-480. Y-type filter can ... essential for a device, usually installed in the hydraulic control valve, relief valve, pressure relief valve, water valves and other equipment, set the import ...