AISI 4340 Chromoly Alloy Oil Well Drilling Pipe , Seamless Steel Pipe for Oilfield Exploration Description This AISI 4340 Chromoly Alloy Oil Well Drilling Pipe represents the pinnacle of performance ...더 보기
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AISI 4340 Chromoly Alloy Oil Well Drilling Pipe , Seamless Steel Pipe for Oilfield Exploration