常見例句雙語(yǔ)例句A kind of multistage steam-water jet vacuum pump applied to the chemical, pharmaceutical and grease industries is described.敘述一種多級(jí)汽水組合射流真空泵的開發(fā)與研究和在石油化工、制藥、油脂等行業(yè)中的應(yīng)用。 返回 steam jet pump