C.Z type purlins serve as components of mainbody in simply supported or continuous way, There are materials with Q235 grade of strength.是什么意思_C.Z type purlins serve as components of mainbody in simply supported or continuous way, There are materials with Q235 grade of strength.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句