We, ZhongYuan Special Steel Co.,Ltd, since1970 , 4200 workers, based on the whole line of steel making, forging, machining, and heat treatment, could produce integral drill collar ,spiral DC ,...
The Nikkoshi Group is offering products using its uniquely cultivated microfabrication and magnetic application technologies and based on its function as a metal material trading company.
Equipment...
drilling industries on a global basis.
We have API Q1, API 7-1, NS-1, ISO9001, ISO14001, and ISO45001 certificates. Shenlong's main products include Non-Magnetic Drill Collars / Flex Collars,...
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