2007
Guangzhou Yongsheng Iron and Steel Products Co., LTD., adding boiler heat exchanger tube production line, annual production capacity of 7200 tons; Guangzhou Yongsheng Iron and Steel Products Co., LTD., add thin wall drinking water pipe production line, annual production capacity of 12,000 tons; [Sanitary Approval Document for Products related to Drinking Water sanitation Safety]
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