GB / T 19472.1-2019 ????? ?? ???? ?????? ??????? ??? ????? ?????
???? 1: ???? ?????? ?? ????? ??? ?????
???? ?? ????? ????? ? ??? ????? ??? ???? ??? ? ????? ???????? ??????? ?? ???. ?? ???? ???? ?????? ???? ? ????? ???? ??? ??? ????? ?? ?? ???? ??????. ??? ????????? ???? ???? ??? ?????? ?? ????? hdpe ? ???? ??? ???? ????? ?????? pe ? ???? ???? ?? ????? ?? ???
???? ??????: GB / T 19472.1-2019 Buried PE Structural Wall Pipeline System ? ???? 1: ???? ?????? ?? ????? ??? ?????
1