cutting disk Pass ISO9001:2000 Yanjing receives China Patent for Invention Self-developed H13K,HMB and HMKhigh alloy steel cutting disk1 ... Pass the ISO9001 quality certification 2 The brand yanjing receives ... -developed H13K,HMB and HMK high alloy series 6 Features:High intensity, high hardness, high toughness, and high hardenability, etc. 7 Blade ...