????? ?? ????? ????? ?? ??????? ?????? ??????? ?????? ???? ?????? ???? ????? ?????? ??????? ?????. ???? ??????, ????? ???????? ?????? ????????? ????? ????? ???? ????? ?? ?????? ????? ??????? ????? ?????, ?? ????? ?????? ?????? ?? ?????. ??????, ???? ???? ?? ???????? ?????? ?? ????? ??????, ?? ???? ?????? ?????? ???????? ????? ?????. ???? ?????? ??????? ????? ???? ?? ?????? ????????? ?? ?????, ?????? ???? ???? ???? ??????? ?? ????? ?????? ??? ?? ?????? ???????. ?????? ??? ?? ???? ??????, ???? ?????? ?? ?????? ?????? ??? ??? ??? ??? ??????? ????? ?????? ???????. ?? ???? ??????? ??????? ????????? ????, ????? ????? ???? ?????? ???? ??? ???? ?? ??????. ?????? ?????? ??? ????? ??: ???????? ?????? ??????? ??? ?-45-60℃, ????????? ??? ???? ??????? ?? ???? ??????? ???? ??? ??? 110℃ ?-190℃. ????? ???? ??? ?????? ??? ???????? ???? ????? ???? ????? ????? ????? ???? ?????? GB/T 8174-2008.

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