For compressed air and vacuum, the NuAmatics poppet valves are ideal for single acting cylinders, air bellows, and vacuum material handling.是什么意思_For compressed air and vacuum, the NuAmatics poppet valves are ideal for single acting cylinders, air bellows, and vacuum material handling.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句