- API 7-1 Drilling String Petroleum Non Magnetic Drill Collar Ordinary
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AISI4145h, 4145h Mod, Non-Magnetic Material Drill Collars
2025-04-13
introduction 3010
1 Year
Forging
Polishing
Atmospheric Pressure
P550
API
East heavy
Iron Frame Packaging
According to the custom
Henan China
8431431000
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