blasted acc. to ISO 8501-1, cleanliness scale Sa 2½.1 }& `, ^5 n7 I% s J- h3 Q
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ISO 8501-1:1994 6 {% w8 h) M0 V涂料和有关产品使用前钢衬底的制备.表面清洁度的视觉评价.; ~' m( A: w) }: V: W; Z# L http://www.3dportal.cn/discuz/viewthread.php?tid=309855&highlight=8501% S& I+ \& w4 Y, _) C3 t$ W; f
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最新版的; r9 J# ?0 n0 VISO 8501-1:2007 Preparation of steel substrates before application of paints and related products -- Visual assessment of surface cleanliness -- Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings : f* } W) n9 m( q$ w; r% {http://www.3dportal.cn/discuz/viewthread.php?tid=336910&highlight=8501