... mining tools 1.the product has passed the ISO9001/2008 2.specilized in drill bit supply the high-quality and competitive Coal mining ... for Mining and Mineral ground tool,Foundation drilling,Horizontal directional drilling(HDD),Trenching,Hydraulic ... box Place of originZhejiang.ChinaApplicationDrilling,Trenching,Mining and Tunnelling,RecyclingCertificationISO9001:2008MaterialASTM4142 / 42CrMoPort of ...