... cone bits Roller cone bits with wide crest cutters 1.Bit diameter code: indicated by numbers (integer or fraction). The numbers ... indicate diameter of the bit in inches.The series codes of oil well drilling bits ... )HJT: Metal face sealed journal bearing, special gage protection537: Insert bit for drilling in soft to medium hard formation with low ...
... w High lighting efficiency, super energy saving comparing with traditional T8,T10 lamp. CE,ROHS,CCC,ISO9001 certificate approval.This model ... same lumen and changed the 20W T8 fluorescent lamp easily. T5 21W for substituting 30W T8 fluorescent lamp, T5 28W for substituting ... the 40W T8 fluorescent lamp. Save energy more ...
... Product Description PDC Drill BitPDC Anchoring Drill Bit THEORY: PDC(Polycrystalline Diamond Compact) drill bit is a new product after the hot ... -pressed and electroplated drill bit in recent years. With special hith-frequency weldin techniques, ... resistant is welded to the body as cutting edges. PDC bit is mainly used for geological prospecting, coal exploration, water ...
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