ä¸ææ«é»å±±æ¸©åº¦è¿æç¹ä½ï¼æ¥æ¶ç©¿äºå®½æ¾çéåç»å±±è¡£æï¼æå²éè¡£æ好ãåå¦å¤å¸¦ä¸ä»¶ä¿æå
è¡£æåç¹çè¡£æï¼é»å±±æ©æ温差æ¯è¾å¤§ã
é»å±±æ
游å
¨æ»ç¥ï¼
http://wenku.baidu.com/view/695adc7bb52acfc788ebc91c###æ¥æ¨çä¸ä¸å¯¹æ¨çé»å±±ä¹è¡ææ帮å©ã