
PLASTICS PIPING SYSTEMS FOR WATER SUPPLY - UNPLASTICIZED POLY(VINYL CHLORIDE) (PVC-U) - PART 4: VALVES AND ANCILLARY EQUIPMENT
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
PLASTICS PIPING SYSTEMS FOR WATER SUPPLY - UNPLASTICIZED POLY(VINYL CHLORIDE) (PVC-U) - PART 4: VALVES AND ANCILLARY EQUIPMENT
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻