Secondly,the least length of pretensioned prestressed concrete slab is defined to make the full use of steel strand strength and avoid flexural crack occurs within the development length.是什么意思_Secondly,the least length of pretensioned prestressed concrete slab is defined to make the full use of steel strand strength and avoid flexural crack occurs within the development length.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句