往复真空泵 meaning in Chinese

piston vacuum pump

An investigation into the design and energysaving analysis of gas press ure balance way of reciprocating vacuum pump
往复真空泵平衡气道的设计与节能分析研究
Provides gas compression solution for the oil and gas industry with products ranging from compressors and turbines to pumps , valves , gas meters , fuel dispensers
-生产经营水环真空泵及压缩机旋片真空泵往复真空泵罗茨真空泵真空机组及真空干燥等。