???? ??? ???????? ???????? ??????? ??????? ??????????? ??????? ????????? ??????? ??????? ??????? ????? ???????? ???? ??????? ?????????? ?????? ???? ???????? ?????? ??????? ????? ?????? ????????.
????? ??? ????? ??? ?????? ????? ???????? ?????? ??????? ??? ???? ??????? ????? ????? ???? ?? ?????? 45 ???? ????? ?? ?????? ????? ??????? ?????? ?????. ????? ????? ??????? ?????? ????? ?????? HDPE ??????? ?????? GBT19472. 1-2004
??? ??????? ?? ??????? ?????? ???????? ??????? ?????? ?????? HDPE. ??? ??????? ?? ??????? ?????? ?????? ?? ??? 2004. ?? ????? ??????? ?? ??? 2019. ??????? ?????? ?? GB / T19472.1-2019HDPE ????? ???????? ??????? ?????? ??????.