A.1∶2水泥砂漿做暗護(hù)角 B.1∶2水泥砂漿做護(hù)角 C.1∶3水泥砂漿做護(hù)角 D.1∶3水泥砂漿做暗護(hù)角
A.2 B.4 C.1.5 D.3
A.50MM B.55MM C.60MM D.65MM