Tender for Supply Of Trr Bits Sub For Trr Bits And Head - 4 7by8 Inch Size Trr Non-coring Bit , 5 7by8 Inch Size Trr Non-coring Bit , 6 3by4 Inch Size Trr Non-coring Bit , Casing Head Hx , Casing Head Nx , Sub For 5 7by8 Inch Size Trr Bit , Sub For 4 7by8 Inch Size Trr Bit in Ramgarh - Jharkhand

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