There are two methods for welding radial stiffeners to bias-rail box girder: welded all around and open at tensile flange.是什么意思_There are two methods for welding radial stiffeners to bias-rail box girder: welded all around and open at tensile flange.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句