Open the hand-operated air valve(3),air cylinder(2),i.e.Tightly press the Machining aluminium materials,shut(3),then loosen is.是什么意思_Open the hand-operated air valve(3),air cylinder(2),i.e.Tightly press the Machining aluminium materials,shut(3),then loosen is.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句