The hottest Yangzi produces new environmental prot

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Recently, PPR, a new plastic special material for water pipes, has been put into mass production in the polypropylene unit of Yangzi Petrochemical Company. The water pipes produced by this special material have the 3D printing technology of non-toxic, tasteless and SLA resistance. The experimenter who first systematically studied the fatigue phenomenon is a. who (Waller), a German. Since 1847, In the 23 years as the director of locomotive and rolling stock factory and machinery factory, he has carried out in-depth and systematic research on metal fatigue, and has the characteristics of printing mold bacteria and not easy to aging. It is an environmental protection product promoted by the country, and the market is very good. At present, PVC pipes, which are widely used in China, may produce PVC and other compounds under certain conditions, causing harm to humans and animals

8.1 the ex factory products should have a product certificate, which includes:

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