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"No matter new customer or previous client, We believe in prolonged time period and trustworthy relationship for Spiral Magnetic Drill Collar , Magnetic Drill Collar , Spiral Drill Collars , The quality of our products and solutions is equal to OEM's quality because our core parts are the same with OEM supplier. The above goods have passed experienced certification and we not only can produce OEM-standard products but we also accept Customized Items order.