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API7-1 Drill Collars/Non-Magnetic Drill Collar Spiral Drill Collar Nmdc
2025-04-13
introduction 2340
3-1/8---11inch
3 Years
3 Years
CNC Milling
Polishing
Atmospheric Pressure
Alloy
API7-1 7-2
API Reg API If Nc
9140mm 9450mm
Arnco 350xt or Other
AISI 4154h
P530 P550
JX
Steel Support
3-1/8inch---11inch
China
8431431000
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