139.7mm*9.17mm N80 LTC, STC,BTC casing 139.7mm*9.17mm N80 LTC, STC,BTC Technique Seamless Place of Origin China Specification 139.7mm*9.17 Grade N80 Outer Diameter 139.7mm Length R3 Thickness 9.17mm Usage Oilwell drilling
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139.7mm*9.17mm N80 LTC, STC,BTC casing 139.7mm*9.17mm N80 LTC, STC,BTC Technique Seamless Place of Origin China Specification 139.7mm*9.17 Grade N80 Outer Diameter 139.7mm Length R3 Thickness 9.17mm Usage Oilwell drilling