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Mudanjiang Dongxu Machinery Co.,Ltd is a private factory collecting with research, production, sales, service.our factory has been in business for over 7 years. I'm working in this line for 5 years. It is a high and new tech enterprise specially appointed supplier to China National Petroleum Corporation and Chemical Corporation in the drilling tools. Our factory has passed ISO9001;2000 Standard quality system authentication, and been honored with API spec-7-1 certificate by America Petroleum Institute. Our ...
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