What Are The Quality Requirements for Rock Flat?

When we buy rock flat, platform, granite square ruler, rock box, rock v-frame and rock precision components, we should pay attention to some problems.

Rock flat face should be uniform color, surface is smooth, no cracks, sag and tissue loose phenomenon, and there should be no wear marks, scratches, burns and other defects, which will affect the accuracy of platform. The plates allow to have certain defects that do not affect the accuracy.

After the work of the rock flat surface of the depression, or does not allow unauthorized repair, avoid the normal use in the latter part.