çµé»R21ï¼å°±æ¯æ§å¶æµç»åºæåºç®¡çµæµçå ³é®å 件ï¼
å½æµç»R21ççµæµå¢å æ¶ï¼çµé»çµååé«ï¼åºæçµåï¼ï¼å¯¼è´ä¸æ管éçµæçµæµåé«ï¼çµé»R14ççµåéå°±å¢å ï¼é£ä¹æ æçµåå°±ä¸éï¼åºæåºç®¡ç导éè½åä¸éï¼æµç»R21ççµæµå°±åå°äºï¼åä¹äº¦ç¶ãè¿æ¯ä¸ªè´åé¦ä½ç¨ï¼ä»èè¾¾å°ç¨³å®çµæµçç®çï¼