reciprocating vacuum pump造句
例句與造句
- An investigation into the design and energysaving analysis of gas press ure balance way of reciprocating vacuum pump
往復(fù)真空泵平衡氣道的設(shè)計(jì)與節(jié)能分析研究 - It's difficult to find reciprocating vacuum pump in a sentence. 用reciprocating vacuum pump造句挺難的