... gqch : San mai lam bAng b6t6ng cdt thkp, tudng bhng gach. Loqi k6t cdu nay ki6n c6, bin chAc, phbng h6a va phbng dm d6u tumg d6i t6t. So vdi k6t cdu bet6ng c6t th6p gia thanh rE! hm, ti& ... cot bang b6t6ng c6t thkp. Loqi k6t cdu nby ki6n c6, b6n chiic, chju dtfqc nhiet 66 cao, thugn tien cho viec c6ng nghiep h6a. Diing nhi6u cho cac c6ng trinh c6ng nghigp, nhi c6 nhidu chdn dong ... ke" ki6n truc kh6ng ngh? tdi khi ngng c6u tao va sq hdp Iy cca n6 la khBng thyc te", s6 gAy ra lang phi. DBng thdi bien phap c6u tao t6t hay x6u cihg c6 i~ih liififng nh6t ddjnh tdi yeu...