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RkPrev - ???????ȸ????????????ˤ???

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#include <canna/RK.h>
int RkPrev(cxnum)
int cxnum;

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RkPrev ?ϡ????????ȸ????????????ˤ??ޤ??? ???????ȸ??䤬??Ƭ?????ξ??硤?ǽ??????ذܤ??ޤ???

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