API standard E75 X-95, G-105 S135 steel grade, diameter from 2 7 / 8 "to 5 1 / 2" series is a drill pipe and high torsional
API drill pipe
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API standard E75 X-95, G-105 S135 steel grade, diameter from 2 7 / 8 "to 5 1 / 2" series is a drill pipe and high torsional