??????? ‘? ??? ??’ ??
‘?????????????’ 2? ?? ??
???(10??) ‘N?, ????? ?????’ ??
????(04??) ‘??․????? ????’ ??
?????? ????(???? 1?)? ????(???????? 4?)? ?? 5? ?? ????? ???????? ??? ‘?21? ?????????????’ ?????? ??? ??????? ??? ?? ???? ??? ???.
2010??? ??????? ??? ?? ????????? ??? ????? <N?, ?? ??? ??? ??>(N-type, tailored multi-angle creative block)?? ??? ????, ??? ??? ? ??? ??? ??? ??? 90? ??? ??? ?? ?? ??? ??? ??? ? ??? ??? ??? ???? ??? ?? ???? ??? ????? ???? ?? ? ?? ??? ????.
?? 2004??? ????????? ??? ????? ‘??? ??? ??? ????’(Chair Wheel Available of Rolling Moving and Braking)? ?? ? ??????? ????, ? ???? ????? ?? ??? ??? ????, ????? ???? ?????? ????? ????? ???? ? ? ??. ?????? ?? ??? ?? ??? ??, ??, ??? ? ??? ??? ??? ???? ???? ??? ??, ??? ??? ???? ????? ??? ????. ??? ?? ????? ’????’?? ???? ??.
???? ????? ????????? “????? ??? ??? ?????, ???? ?????? ??? ?? ? ???. ???? ????? ??? ??? ?????”? ???.
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