1-polished with bi, natural stone materials, artificial sharpening tools along with chemicalsIs the tool for grinding and machining details on vibrating tools, after some time the details are rubbing with abrasives and chemicals will make the surface details are certain luster. This approach is consistent with details of the type of small, light, the shape of any complex, as is the type of thin disks with no sharp edges. Only for the details that do not require high accuracy
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