JIS K6740-1-1999 Plastics -- Unplasticized poly (vinyl chloride) (PVC-U) moulding and extrusion mate
标准简介
JIS K6740-1-1999 Plastics -- Unplasticized poly (vinyl chloride) (PVC-U) moulding and extrusion materials -- Part 1- Designation system and specifications
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