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Welding Quality System Certificate
The certificate is ISO3834-2 welding quality system certification, by the international inspection group (BV) issued. Certificate of application: steel structure products. This certificate marks the welding quality system of Tongyu Heavy Industry Co., Ltd. conforms to ISO3834-2: 2005 standard, It can provide steel structure products to meet the requirements of laws and regulations and customer satisfaction, and further improve the competitiveness of the international market.
EN1090 factory production control conformance certificate
GB/T28001/OHSAS18001 Occupational Health and Saf