A.A欄 B.B欄 C.C欄 D.D欄
A.100mm B.102mm C.105mm D.110mm
A.型砂強(qiáng)度 B.型砂的流動(dòng)性 C.型砂的韌性 D.型砂的吸濕性
A.1mm B.2mm C.3mm D.4mm