12 元券铝管圆管国标57mm663¥980去看看因人成事111发布了国标铝管7.8 9 11.05 1亮2.7 23 37 60 57mm663光铝圆管厚1 2499砂带研磨钻石101.6¥135000去看看WDF 旺德福发布了3M 663FC钻石研磨砂带101.6mm*2410mm*70mic (4in*94-57/64in)