Using waveform steel web to replace conventional PC box girder web may greatly reduce dead weight of PC box girder,meliorate strain condition of girder body and save material,also it may reduce project volume of lower structure and reduce project cost.是什么意思_Using waveform steel web to replace conventional PC box girder web may greatly reduce dead weight of PC box girder,meliorate strain condition of girder body and save material,also it may reduce project volume of lower structure and reduce project cost.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句