my nghin bt xi mng
NGHIN CU S DNG PH THI PH D CNG TRNH . NGHIN CU S DNG PH THI PH D CNG TRNH NGHIN CU S DNG PH THI PH D CNG TRNH Cc mu PTXD −c gia cng trn my kp hm n kch th−c Dmax cp phi b tng c l−ng hm l−ng xi mng nh− nhau 350kg/m 3 b tng v bng vi hm l−ng xi mng