Reverse circulation hammer: Certificate: ISO9001:2008,SONCAP Precise rock sample,Low cost long service life Usage: Drill holes from 140mm to 160mm.Matched Bits:Can match Bits with Mission50,SD5,MATCH50,QL50,DHD350DD,COP54 Shanks.Application Range: Geological exploration,ore mining.Design Principles: To arrive at target depth exactly and improve the productive efficiency with low cost,durable ...