... We have advanced heat treatment workshop which is capable of doing normalizing, annealing, quenching and tempering processes. Our ... Sino-truck, Bosch Rexroth, Kerui Group, Dezhou United Petroleum Machinery, Jier Machine-tool Group Co., Ltd., Shantui Construction Machinery, Beijing Baoji ... Korea, totally more than ten countries and regions. Foreign customers visit our company regularly per year to see ...