A.強(qiáng)度損失率不大于25% B.強(qiáng)度損失率不大于20% C.質(zhì)量損失率不大于10% D.質(zhì)量損失率不大于5%
A.DPM15 B.DMM10 C.DPM10 D.DPM5
A.P6 B.P8 C.P10 D.P4