Aiming at some problems of common steel-concrete beams, this article puts forward a new type of composite beam-steel-encased composite beam.是什么意思_Aiming at some problems of common steel-concrete beams, this article puts forward a new type of composite beam-steel-encased composite beam.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句