The commonest way for the installation of glass wool felt for steel structure is to lay the steel structure with glass wool felt on the purlin in the direction of same starting from the end wall.是什么意思_The commonest way for the installation of glass wool felt for steel structure is to lay the steel structure with glass wool felt on the purlin in the direction of same starting from the end wall.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句