Meanwhile, since the steel trusses are relatively high,the builders must use the special movable platform to carry out the job of upper booms installation.是什么意思_Meanwhile, since the steel trusses are relatively high,the builders must use the special movable platform to carry out the job of upper booms installation.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句