. chang yong sheng wu ke ji ci dian. botany. 892 人ä½åå¨ç©ççå-¦é¨å çååºåé³åæ¯å¨åæ¶æè®°å¨è®°çº¹ é¼ä¸ãé³åæ¯å¨çæ³¢é¿ä¸ºç§ï¼ å¯ç¨å®ä½åä½åæççååºçæ¶é´ ç¹æ§ã èæå¨è®°å½ç¼æ ¢ççååæ¶é´ ç仪å¨ã常ç¨çæ¯éæå¼èæå¨ãå® å©ç¨é表çæºä»¶ç»´ææé¤çæå¨ï¼ ä»è使æè½´æ ¹æ®éè¦æä¸å®é¢çæ å¨ï¼æ轴两端çéå±ä¸ä¾¿å¯äº¤äºé å ¥å离å¼æè½´ä¸æ¹ä¸¤è¾¹çæ°´é¶æ§½ï¼ 使çµè·¯æ¥éæä¸-æ-ï¼ä»è使串èå¨ ç´æµçµè·¯ä¸-ççµç£æ 以ä¸å®çé¢ç æ iå·±å¨è®°çº¹çº¸ä¸ï¼ä»¥ä¾¿åæççå åçæ¶é´ç¹æ§ã é´éè®°æ¶å¨å¯æ ¹æ®éè¦éæ©ä¸ å®é´éè¿è¡æ¶é´æ è®°çè®°æ¶ä»ªå¨ã å®ç±é©¬è¾¾ã齿轮ãå¼¹çåååå¨ç-ç» æã马达å¯ä½¿åè½´ç齿轮ç»æ¯å转 å¨ä¸å¨ã齿轮ç»ä¸å齿轮ç齿æ°å å«ä¸º60ã3


. chang yong sheng wu ke ji ci dian. botany. 892 人ä½åå¨ç©ççå-¦é¨å çååºåé³åæ¯å¨åæ¶æè®°å¨è®°çº¹ é¼ä¸ãé³åæ¯å¨çæ³¢é¿ä¸ºç§ï¼ å¯ç¨å®ä½åä½åæççååºçæ¶é´ ç¹æ§ã èæå¨è®°å½ç¼æ ¢ççååæ¶é´ ç仪å¨ã常ç¨çæ¯éæå¼èæå¨ãå® å©ç¨é表çæºä»¶ç»´ææé¤çæå¨ï¼ ä»è使æè½´æ ¹æ®éè¦æä¸å®é¢çæ å¨ï¼æ轴两端çéå±ä¸ä¾¿å¯äº¤äºé å ¥å离å¼æè½´ä¸æ¹ä¸¤è¾¹çæ°´é¶æ§½ï¼ 使çµè·¯æ¥éæä¸-æ-ï¼ä»è使串èå¨ ç´æµçµè·¯ä¸-ççµç£æ 以ä¸å®çé¢ç æ iå·±å¨è®°çº¹çº¸ä¸ï¼ä»¥ä¾¿åæççå åçæ¶é´ç¹æ§ã é´éè®°æ¶å¨å¯æ ¹æ®éè¦éæ©ä¸ å®é´éè¿è¡æ¶é´æ è®°çè®°æ¶ä»ªå¨ã å®ç±é©¬è¾¾ã齿轮ãå¼¹çåååå¨ç-ç» æã马达å¯ä½¿åè½´ç齿轮ç»æ¯å转 å¨ä¸å¨ã齿轮ç»ä¸å齿轮ç齿æ°å å«ä¸º60ã30ã12ã 6å2个ç-ãæ¯ä¸ªé½¿ è½®çä¸æ¹è£ ä¸ä¸ªå¼¹çï¼å¼¹çå¯ä½¿å ¶ ä¸æ¹éèçå°åç»ç¼ç©ä¸é½¿è½®ç齿 çæ¥è§¦ãå½é½¿è½®è½¬å¨é½¿çä¸ç»ç¼ç© æ¥è§¦æ¶ï¼å¼¹ç便被æèµ·ï¼ä½¿å ¶ä¸å ¶ ä¸æ¹çµç£æ çµè·¯çæ¥è§¦ç¹æ¥è§¦ï¼ä» è使记æ¶å¨ççµç£æ çµè·¯æ¥éï¼å¼ èµ·çµç£æ çæç¬æ¯å¨ï¼å¨è®°çº¹çº¸ä¸ ååºæ¶é´æ itï¼ã rtrT'齿轮ç»i^iè½®ç 齿æ°ä¸åï¼å¯ä½¿çµç£æ çµè·¯åå«æ¯ é1ã 2ã 5 ã10å30ç§æ¥éä¸æ¬¡ï¼ ä»¥æ ¹æ®éè¦è¿è¡éæ©ã é´æå°çº¿ç¤ºæ³¢å¨è®°å½çç©çµç 常ç¨ä»ªå¨ãå®ç±é´æå°çº¿ç®¡ãæ¾å¤§ å¨ãæ«æå¨ç-é¨åç»æãé´æå°çº¿ 管ç±çµå-æªãè§


Size: 2389px × 1046px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectbotany