... .Four taps,four gaug SHB-III Type Water Circulating Multi-purpose Vacuum PumpI. The uses of vacuum pump: ... property right (Patent No.:ZL02326871.9)The series of Multi-purpose Circulating Water Vacuum Pump takes circulating water as ... chemical industry, pharmacy, biochemistry, foodstuff, pesticide, agricultural engineering, biological engineering.II. The characteristics of vacuum pump: A. Cyclically use ...