1.Air pump for pumping vacuum. 2.Can dispose PLC program. 3.Divide ... applied in power supply bureau,power plant,transformer factory,vacuum smelting, welding, drying, chemical pharmacy, industrial and mining ... enterprise for vacuum pumping; Working platform pressure: 133pa Limit vacuum: 7pa Not suitable in pumping poisonous ... Industry DL/T 521-2004 HTJ-70 Vacuum Air Pump Set