ãå¼å½¢çã
å¼å½¢çå±äºå¯¹ææè¸åå好度é½æ¯è¾é«ççå½¢ï¼ç¹ç¹æ¯ä¸åçç头ï¼æ弧度并ä¸ä¸æ¬çç峰以åç¥é«äºç头ççå°¾ï¼å¼å½¢çä¸è¬é½æè§è§ä¸ææè¸åçææï¼æ以ä¹æ¯ææç¥ççå½¢ã
ãåçã
åç常è§äºåç§å¤è£ æ¦ä¾ çä¸ï¼æééæç»å ¸çè§è²ä¸æ¹ä¸è´¥å°±æ¯ç»çå 强ççåçãåçæ¬èº«èªå¸¦è±æ°ï¼æ以ä¸å¤ªéåè¸é¨çº¿æ¡ç¡¬æçæ¹è¸ã
ã弯çã
åè¸è¸é¨çº¿æ¡å润ï¼éæ©çå½¢éè¦æä¸å®è§åº¦çæè½å¼±åè¸åç童幼æï¼å¼¯çè¿äºæ¸©æï¼å¹¶ä¸éååè¸ã
4
ãä¸åçã
ä¸åçåºè¯¥æ¯å¾å¤ç¾å°å¥³é½è¸©è¿çåäºï¼å®è½ç¶çä¸å»äººçæ 害ï¼èä¸ææ é¿è¥é æ¥æ¥å¯æçæ è¾æï¼ä¸è¿ä¸æ¦ä¸çç¥å¾å®¹æç»æ两æ¡æ¯æ¯è«ï¼æ以ä¹æ¯æ¹è¸å°å¯ç±èä¸è½æ¥è§¦çç±»åãå ¶ä»è¸åå¦æççå欢ä¸åçï¼åªéè¦æ ¹æ®èªå·±æ åµéå½è°æ´ç»èï¼ä¹æ¯å¯ä»¥ç»åºæ¼äº®çä¸åççã