1CS91.140.10P46中华人民共和国国家标准GB/T38097-2019城镇供热玻璃纤维增强塑料外护层聚氨酯泡沫塑料预制直埋保温管及管件Urban heating-Prefabricated directly buried insulating pipes and fittings withpolyurethane(PUR)foamed-plastics and glass fiber reinforced plastics protect layers2019-10-18发布2020-09-01实施国家市场监督管理总局发布中国国家标准化管理委员会
