国产无套码AⅤ在线观看,福利午夜免费专区,日韩AV女优一区二区资源,av2018天堂网址,美女胸又大又黄又www网站,成年人啪啪啪视频

7 l?a ch?n c?ng ngh? cho ?? c?ng bánh xe

2014-06-28 1161

Abrasive hardness refers to the degree of difficulty of grinding wheel in the grinding force was dropping on the surface, how to select the grinding wheel hardness, small make up here to tell you.
1 grinding soft materials to choose grinding hard, grinding hard materials should choose soft grinding wheel;
2 cooling liquid grinding dry grinding wheel hardness and high 1~2 level;
3 grinding soft and toughness of non-ferrous metal, hardness should be too soft;
4 the end mill grinding wheel hardness than the circumference, should choose soft;
5 in the grinding under the same conditions, to a high of 1~2 small grade resin bond wheel than vitrified bond grinding wheel hardness;
6 grinding poor thermal conductivity material should be soft grinding wheel;
7 wheel rotation speed is high, the grinding wheel hardness optional soft 1~2 level.

霍城县| 钟祥市| 宁陵县| 金山区| 重庆市| 永福县| 东源县| 深泽县| 德钦县| 上虞市| 德清县| 迭部县| 古丈县| 樟树市| 洱源县| 龙里县| 平乡县| 博湖县|