2016年10月10日星期一
Drill Collar
With a sole aim in delivering quality products, we are the prominent Exporter of Non-Magnetic Drill Collar in Beijing, Beijing, China. Luhai non-magnetic drill collars are made from non-magnetic materials with low-magnetic permeability. API monogram, serial number, OD, ID, type and size of connections are stamped on recessed mill flats.
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