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???????? 27? ?? 10?30?? ?? ??? ??? ?? ?? ????? ????.
?????? ??? ????? ????? ??? ???? ??? ??????? ?? ??·???, ???, ??, ?? ???? ??? 10~30㎜? ?? ?? ???? ??.
?? 28? ?? 3??? ??? ??? ???.
??? ???? “??? ???? ??? ??? ? ???”? “????? ??? ??, ??? ??? ???? ???”? ???.
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