????? ????? ??????? ?????? GBT19472.1-2004 ??? ?????? ??????? (PE) ???????? ???? ???? ?? ?????? ????? 1 ?????? ??????? ???? ????? ?????? ????????

2025-03-19

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????? ????? ??????? ?????? GBT19472.1-2004 ??? ?????? ??????? (PE) ???????? ???? ???? ?? ?????? ????? 1 ?????? ??????? ???? ????? ?????? ???????????19?????

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

?? ?? ????? HDPE ?????? ?????? ?????? ???????? ?

????? ????? PVC HPVC ?????? ?????? ?????? ????????

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