A.耐久性B.易維修性C.設(shè)計(jì)可靠性D.適用性
A.內(nèi)在質(zhì)量B.外觀質(zhì)量C.社會(huì)質(zhì)量D.經(jīng)濟(jì)質(zhì)量
A.粒面革B.修面革C.壓花革D.特殊效應(yīng)革