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本帖最后由 TSS6799 于 2022-6-30 08:38 编辑
PD CEN TS 17176-3-2022 Plastics piping systems for water supply and for buried and above ground drainage, sewerage and irrigation under pressure - Oriented unplasticized poly( vinyl chloride) (PVC-0) Part 3:Fittings |
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