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API Standard Oilfield Drilling Sinker Bars Oil Drilling Weight Rod API11B sucker rod ...
Product Name slotted pipe manufacturers oil well perforated pipe slotted bore pipe ...
Overview Specifications Steel Grade: Stainless Steel Standard: AISI, ASTM, DIN, ...
Manufacturing process of heavy alloy: http://www.zzstc.com/Tungsten-Alloy/heavy-allo...
API Spec 11B Sucker Rod for Oil well drilling polish rod AISI 4130 sucker rod A suc...