retarded concrete 中文意思是什麼
retarded concrete
解釋
緩凝混凝土-
Application of scour and abrasion resisting high grade concrete mixed with silica powder and retarded water - reducing agent in zipingpu hydropower station
緩凝高效減水劑配製高標號抗沖耐磨混凝土在紫坪鋪電站中的應用
分享友人