The analysis and test on rotating fan are made to specify the counter rotating efficiency of diffuser tube with diffuser tube(tower),silencer and collector is lower 50% than YB2F(JBT) series.是什么意思_The analysis and test on rotating fan are made to specify the counter rotating efficiency of diffuser tube with diffuser tube(tower),silencer and collector is lower 50% than YB2F(JBT) series.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句