Wedgeplug valves can be furnished with steam jackets for use on lines carrying any product that will harden or congeal at ordinary temperatures.是什么意思_Wedgeplug valves can be furnished with steam jackets for use on lines carrying any product that will harden or congeal at ordinary temperatures.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句