?????? ???? ?????????, ???? ????? ????, ????? ???????? ???????, ??????? ???? ???? ????????? ?????? ?????, ?????? ?? ????, ???????? ???? ??????? ????? ????? ???????, ?? ?? ????? ?????; ?????? ????? ??????? ~
????? ???? ????????? ?? ?????? ?????? ???? ????, ????? ???? ????????? ?????? ??? ????? ????? ???? ??????, ??? ???? ????? ?????? ???? ???? ?????, ?? ???? ????? ?? ???? ?? ????? ????? ?? ??????? .
???????? ???????? ?? ????, ?????, ?????? ???? ????? ?? ?? ???? ?????? GB6063.
???????: ???? ?? ???? 2.8, ??? ?????, ????? ???? ??????, ????? ???? ?????, ??????? ?????? ?? ???? ? -10 ?????.
?????? ???? ????????? ?? ???? ???? ???? ???, ????? ?????? ??? ???? ????? ????? ?????, ??? ?????? ?????? ????? ?? ???? 0.12m / m.
???? ???? ?????? ???? ????????? ?? ?? ??????????? ?????? ????? ??????, ?? ???? ??? ???? ???? ??? ????, ???? ????? ?? ?????? ???? ???? ??????, ?? ???? ????? ?? ???? 0.5 ~ 5 ?"?. ????? ?????? ???? ???? ???, ??? ?? ?? ???? .
?????? ??? ???? ?? ?????? ???? ????????? ?? ?? ??? ????? ???? ?????? ?????: ?????, ????????, ?? ????, ?? ???? ????? ??? ???. ???? ?????? ?? ?????? ??????? ????? ?????? ?????? ?? ???? ?????? ????? ?? ?????? ????. ????? ?????? ????? ?????? ?? ?? ???? ?????? ?????? ?? ??? ??????, ?????, ????? ?????? ?? 40 ~ 50 ?"? ?????? ??????.
?????? ???? ?????????? ?????? ?????? ???? ???????: ????? ?????, ????? ???, ?? ???? ????? ?????, ??? ?????, ?? ????????, ????, ???? ?????? ???, ????? ???? ??? '
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