???? ??? ????? ?? ??? ????? ?? ???? ???? ????? ?? ???? ? ?? ??? ?? ????????? "GB / T 13663.2-2018 Polyethylene (PE) Pipeline System for Water Supply, Part 2: Pipes" ????? ?? ????. ????? ??? ?????? ???? ? ?????? ??? ?????? ?????:

Hubei AD Building Materials Co., Ltd. ???? ??? ????? ?? ??? ????? ?? ????? ???? ???? ? ????????? ??? ????? ????? ????????? ? ?????? ???? ???? ???? ??? ??? ? ??? ?? ??? ???? ??????? ?? ???? ????? ??? ????? ????? ?? ???. ???? ????? ?? ?????? ???? ?????? ???? ??? ????? ?? ????? ?????? ? ????? ?? Hubei AD Building Materials ? ????: 17399989993 ???? ?????? ? ?? ???????? ?????? ???? ?? ? ??????? ?? ????? ???? ?? ?? ??? ????? ?????? ???!