Pipeline system:lt adopts the most excellent set in the trade. Main part have BURKERT high-temperature air operated valve and SIEMENS vacuum pump.是什么意思_Pipeline system:lt adopts the most excellent set in the trade. Main part have BURKERT high-temperature air operated valve and SIEMENS vacuum pump.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句