A.1%,0.2%B.0.2%,1%C.1%,0.3%D.0.3%,1%
A.5%,10%B.10%,5%C.10%,15%D.15%,10%
A.鑷子鉗摩擦B.刮刀輕刮C.W14-W28號金相砂紙輕砂D.酒精棉擦洗