PVC drainage/ Hollow spiral drain-pipe for building
PVC drainage pipes produce based on polyvinyl chloride (PVC) resin as the main raw material, by adding suitable amount of the stabilizer, lubricant, filler, toner and extrusion molding after fully mixed, and then through multi-channel working procedures such as heating, extrusion, sizing, cooling, traction, cutting, inspection, packing and other processes to complete the production of
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