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Tongyu upgrade the new standard management system

2017-10-30   from:Tong yu Heavy

        Oct 6th 2017, we got the new standard management system certification include ISO9001-2015(GB/T19001-2016),ISO14001-2015(GB/T24001-2016) which shows that our management system is approved as per new global standard, and it will be helpful for our domestic and global marketing.

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