è¿ç§ç°è±¡ä¸»è¦æ¯ç±äºæ°´æ¡¶å
çè¡£ç©ææ¾ä¸å衡导è´è±æ°´æ¶æ¯å¨å¹
度å¾å¤§ä»èæ´è¡£æºèªå¨å æ°´è¯å¾æè¡£ç©å衡顺å©éè¿è±æ°´ç¨åºãä½åå è¿æå
¶å®å ç§ï¼
1.æ´è¡£æºææ¾ä¸å¹³ç¨³ï¼æ 论å°é¢æ¯å¦å¹³æ´ï¼æ´è¡£æºé½åºè¯¥åç´ä¸æ°´å¹³é¢æ对ï¼è¿æ ·è±æ°´æ¶æ¯å¨æå°ï¼
2.水桶å
çè¡£ç©è±æ°´åæ好ææºçæå¼ï¼è¿æ ·å°è±æ°´ç¨åºæ¶å°±ä¼ååºæ示æ¥è¦å£°ï¼æ¤æ¶åæè¡£æååå°ææ¾å¨æ°´æ¡¶åå¨ï¼ç¶ååå
³éæºçï¼è¿ä¸ä¼å¿æ´è¡£æºä¼èªå¨å¯å¨å¼å§è±æ°´ï¼è¿æ ·è±æ°´æ¶æ¯å¨å°±å°å¾å¤ã
3.æ´è¡£æºæ°´æ¡¶ä¸çåæ ¹åæä¸å¹³è¡¡æ弹簧弹åä¸ä¸è´ï¼åºæå个åæè°æ´ä¸è´ï¼å¼¹ç°§å¼¹åä¸ä¸æ ·çï¼åºæ´å¥½æå¼¹åä¸è´çæ°å¼¹ç°§ã
åèèµæï¼http://hi.baidu.com/hbxfyzj/blog/item/ea3411277aa507188b82a16c.html