ДОЛОТО 9 1/2 IADC535X
9 1/2 RS30 UT476 IADC535X 6 5/8REG #unidrilltech #drillbit #triconebit #bitmining #tricone #api #iadc #drilling #mining #oil #waterwell #welldrilling #oilandgas #drill #drillpipe #construction #shirttail #tungsten #tungstencarbide #rockbit #openpitmine