交æµçµæºè¦æ¥çµå®¹ï¼ç®åç说çµå®¹å°±æ¯èµ·å°äº§ç
ç¸ä½å·®ï¼è让çµå¨æºç£åºäº§çâå¼æ¥âï¼çµå¨æºå°±æ转äºã
ããçµå®¹æ¯ç¨æ¥åç¸çï¼ç®çæ¯ä½¿ä¸¤ä¸ªé¥¶ç»ä¸ççµæµäº§çè¿äº90ãçç¸ä½å·®ï¼ä»¥äº§çæ转ç£åºã
ä¸ç¸çµä¸ï¼æ¯ä¸¤ç¸ä¹é´ççµæµæ¬èº«å°±æç¸ä½å·®ï¼ä¸ç¨åç¸ãçµå®¹æåºå¼çµæºæ两个ç»ç»ï¼å³å¯å¨ç»ç»åè¿è¡ç»ç»ã两个ç»ç»å¨ç©ºé´ä¸ç¸å·®90度ãå¨å¯å¨ç»ç»ä¸ä¸²è¿äºä¸ä¸ªå®¹éè¾å¤§ççµå®¹å¨ï¼å½è¿è¡ç»ç»åå¯å¨ç»ç»éè¿å项交æµçµæ¶ï¼ç±äºçµå®¹å¨ä½ç¨ä½¿å¯å¨ç»ç»ä¸ççµæµå¨æ¶é´ä¸æ¯è¿è¡ç»ç»ççµæµè¶
å90度è§ï¼å
å°è¾¾æ大å¼ãå¨æ¶é´å空é´ä¸å½¢æ两个ç¸åçèå²ç£åºï¼ä½¿å®åä¸è½¬åä¹é´çæ°éä¸äº§çäºä¸ä¸ªæ转ç£åºï¼å¨æ转ç£åºçä½ç¨ä¸ï¼çµæºè½¬åä¸äº§çæåºçµæµï¼çµæµä¸æ转ç£åºç¸äºä½ç¨äº§ç
çµç£åºè½¬ç©ï¼ä½¿çµæºæ转起æ¥ã