1, frictional welding water well drilling equipment 2, Grade: E-75, X-95,G-105,S-135 ... 9001.4. Longway has the reasonable price in the market.oil drill pipe meeting API 5DPOwn facility:API, ISO standerd (alloy ... /2,5(inch)UPSET: IU,EU, IEU1, frictional welding water well drilling equipment2, Grade: E-75, X-95,G-105,S-1353 ... .795.000127.0 mm0.50012.70 mm frictional welding water well drilling equipment