Based on the underground of high efficient CC in Ma steel,the longitudinal surface crack and centerline crack,the uppermost defects of beam blank CC production are studied.是什么意思_Based on the underground of high efficient CC in Ma steel,the longitudinal surface crack and centerline crack,the uppermost defects of beam blank CC production are studied.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句