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See Chinese contents: GB/T 23448-2019 GB/T 23448-2019: Sanitary ware -- Flexible hose
This standard specifies the terms and definitions, classifications and codes, materials, technical requirements, test methods, inspection rules, signs, markings, packaging, transportation, storage of flexible hoses for sanitary ware. This standard applies to flexible hoses for sanitary ware, whose working pressure is not more than 1.0 MPa AND water supply temperature is not more than 90-degree Celcius.
