... the domestic market practice, the use made of quality diamond products, floor work for the 5-6mm, product works ... 40% of the domestic customers choose our products, and high cost performance compared to similar domestic ... products, matrix hardness are:
HRC15 ± 1, HRC18 ± 1, ... , HRC43 ± 1, HRC45 ± 1 JSA level - high quality diamond bit (blue)