... Professional manufacturer of Hydraulic machinery forging for REXROTH BOSCH GROUP, include internal gear ring, Provide Bosch Rexroth internal ... Sino-truck, Bosch Rexroth, Kerui Group, Dezhou United Petroleum Machinery, Jier Machine-tool Group Co., Ltd., Shantui Construction Machinery, ... . Our company regards product quality as enterprise's life and attained ISO9001 quality system certification in 2001. ...