| 20110297775 | GRINDING MEDIA - Grinding media for fragmentation and grinding of ores, rock and earth mass and other materials mostly in drum mills, for application in ore mining, construction and other industrial branches. The grinding media have the form of spheroidal tetrahedron, obtained from the crossing of four spheres with equal radii, the centers of each one lie on the top of the surface of the others and are tips of regular tetrahedron. The radii of the spheres are equal to the regular tetrahedron's edge. At least one of the tips ( | 12-08-2011 |
