?? ??? ????? B ??? ??? ????? ????? ????? ? ??? ? ??? ????? ??????? ?????? B ??? ??? ????? ???? ????? ???? ???? ?????? ?????. ???? ??????? ?????? "??? ?????? ??????? (??) ???????? ???? ???????? ?????? ? ????? 2: ?? ?????? ??????? ????????" (?? / T 19472.2-2019) ? ??? ????? ???????? ????? ??? ?????:

A-shaped ????????: ????? ???? ????? ???????? ? ???? ???????? ??? ????? ??? ? ?? ???? ????? ?? ?????? ???? ????. ?????? ??? ??? B: ?????? ????? (?????? ????????) ? ???? ???????? ??? ?????? ?????? ?? ??????? ? ???? ???????? ?? ???? ?????? ? ?????? ???? ???? ?? ??? SN8 ??? SN25. ??????? ???????? ?? ????? ???????? ??????? ????????: ????? ?? ????? ???? ????? ???? ???????? ????? ???? ????? ? ??? ????? ? ??????? ???? ?????? ????????. ??? ???: ???? ????? ???? ???? ??????? ????????? ?????? ??? ???? ???? ??????? ????? ???? ?????? ???????. ?????? ??????: ???? ????? ???? ???? (???? ?? ??? ????? ?????? ??? 12 ?????) ? ??? ???? ?? ??? ??????? ????? ?? ?????? ??????. II. ??????? ??????? ????? ??????: ???? ??????? ??????? ? ???? ???? ?????? ????? ?????. ???? ????? ???????: ????? ?????? ??????? ?????? ?? ??????? ?????????? ??????? ?????????? ?????? ?? ????????. ??????? ???? ????: ?????? ????? ?? ????? ????? ???????. ?????. ????? ??????? ??? ??????? ??? ??? ??? A ????????? ??? ??? B ? ????? ??????? ???????? ???? ????? ?????? ??????????? ??????? ????? ???? ??? ??? ??? A ???? ?????? SN4-SN8 ????? ????? ?????? ? ?? ??????? ???????? ???? ????? ??? ??? B (????? ?????) SN8-SN25 ???? ????? ???? ? ??? ????? ?????? ??????? IV. ???????? ?????? ???? ?? ????????: ??? ?????? ?????? ??????? ???? ?????? ?? GB / T 19472.2-2019. ?????? ????? ??????: ??? SN8 ?? SN12.5 ?? ????? ???? ????? ????? ?????? ?????????. ???? ??????? ????????: ???? AD HDPE Winding B-shaped Pipe ?? Hubei AD Building Materials Co. ? Ltd. ? ???????? ???? ??? ????? ?????? ?????????? ?????? ? ?????? ???? ???? ????? ?? ???????? ??? ???????.

??? ??? ????? ??? ????? ?????? ?? ???????? ?????? ??????? ??????? ?? ?????? ??? ??? ????? ? ????? ??????? ??: 9993-9998-173

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