
Pipes And Fittings Of Unplasticized Polyvinylchloride (pvc-u), With Socket For Elastic Sealing Ring Joints For Sewerage; Technical Specifications For Delivery
出版:German Institute for Standardisation (Deutsches Institut für Normung)

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Pipes And Fittings Of Unplasticized Polyvinylchloride (pvc-u), With Socket For Elastic Sealing Ring Joints For Sewerage; Technical Specifications For Delivery
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频