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Credit 3A level enterprise certificate	National steel and iron profession 3A level enterprise	China petroleum petrochemistry enterprise network database member certificate
American Classification Society	Det Norske veritas approval OF Manufacturer Certificate	Certificate For Product Conf Ormity
Certificate For The System Of Inspection Measurement And Test	Certificate of Adopting International Standards	England classification society
England fatigue authenticates	Standardized good behavior certificate	French classification society1
French classification society	German classification society	German fatigue authenticates
ISO 9001 2000 Standard	Occupational Healthand Safety Management Syetem Certification	Russia authenticates
Ped Certificate