Detailed Product Description It is used in general rock drilling,to supply washing fluid to the well.During operation,it undergoes a pressure test and no leakage occurs. SpecificationExternal Dimensions Φ42/5010 teeth/inch,Φ50 drill rod screw Φ608 teeth/inch,Φ60 drill rod screw SpecificationExternal dimensionsSalvaging Drilling RodJSII-43T34 LeftUsed in small-bore high speed drillingJSIII-50T41.5 ...