| ²é¿´: 2044 | »Ø¸´: 12 | |||||
| µ±Ç°Ö»ÏÔʾÂú×ãÖ¸¶¨Ìõ¼þµÄ»ØÌû£¬µã»÷ÕâÀï²é¿´±¾»°ÌâµÄËùÓлØÌû | |||||
small·Ç·Éͳæ (³õÈëÎÄ̳)
|
[ÇóÖú]
Çó´óÉñ°ïÎÒ·ÒëÒ»ÏÂÕâ¶Î»°°¡ ¡¢Ð¡µÜ¸Ð¼¤²»¾¡£¡£¡£¡¼±ÓÃ
|
||||
| Lenticular-shaped iron truss bridges, built exclusively by the Berlin Bridge Company of East Berlin, Conn., dominated the New England and adjacent area¡¯s modest span bridge market for over a decade at the end of the nineteenth century. This paper examines this phenomenon in the larger context of earlier European development of the lenticular form and, with the assistance of numerous patent drawings and photographs of American lenticular bridges that were either proposed or built prior to the 1883 formation of the Berlin Bridge Company. |
» ±¾ÌûÒÑ»ñµÃµÄºì»¨£¨×îÐÂ10¶ä£©
» ²ÂÄãϲ»¶
¹ú×ÔÈ»ÆÀÉóÒâ¼û
ÒѾÓÐ9È˻ظ´
¹ú×ÔÈ»ÃæÉϸ´ÅÌ~»¶ÓÌÖÂÛ
ÒѾÓÐ14È˻ظ´
ϵͳ²é²»µ½
ÒѾÓÐ11È˻ظ´
ÓжàÉÙÈËÊǽñÌì²éϵͳ֪µÀ½á¹ûµÄ£¿
ÒѾÓÐ18È˻ظ´
Ϊʲô×ÊÖúÊý¸÷´ó¸ßУ¶¼´´Ð¸ߣ¬×Ô¼ºÉêÇëÔõô¾ÍÕâôÄÑ
ÒѾÓÐ12È˻ظ´
ÓÐûÓÐÈÔûÊÕµ½ÐÅÏ¢µÄ
ÒѾÓÐ3È˻ظ´
µ¼Ê¦Í²ۣºÎÒÔõô̯ÉÏÁËÕâô¸ö¼«Æ·Ñо¿Éú£¡
ÒѾÓÐ8È˻ظ´
»ù½ð²»ÖУ¬¹²Ãã
ÒѾÓÐ11È˻ظ´
Â鷳ר¼ÒÃÇ¿´¿´ÆÀίÃǵÄÒâ¼û£¨F¿ÚÃæÉÏ£©
ÒѾÓÐ9È˻ظ´
2026ÄêÒ¶ÆóËï»ù½ð
ÒѾÓÐ6È˻ظ´
» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:
½ÌÊÚÈÃÎÒдresearch planÈ»ºó¾ö¶¨ÊÇ·ñÒªÎÒ£¬ÕâÁ½ÈÕÇó´óÉñ°ïÖú£¬¸Ð¼¤²»¾¡
ÒѾÓÐ12È˻ظ´
ÇóÖú£¡£¡£¡Ð½¨È¼ÁÏµç³ØÊµÑéÊÒÐèÒªÄÄЩ»ù±¾µÄÒÇÆ÷É豸£¬Çó¸÷λ´óÉñ°ï°ï棬¸Ð¼¤²»¾¡
ÒѾÓÐ3È˻ظ´
¹Ì̬·¢½ÍµÄµ°°×ø»îÁ¦ÎÊÌ⣿Çó¸÷λ´óÉñÖ¸µã½É½°¡£¬Ð¡µÜ¸Ð¼¤²»¾¡
ÒѾÓÐ8È˻ظ´
¼±Çó½â~~ Éê¹ýÏã¸ÛµÄ¸÷λ´óÉñ°ï¸öæ ¸Ð¼¤²»¾¡
ÒѾÓÐ8È˻ظ´

mygt_hit
ר¼Ò¹ËÎÊ (Ö°Òµ×÷¼Ò)
-

ר¼Ò¾Ñé: +362 - EPI: 1
- Ó¦Öú: 438 (˶ʿ)
- ¹ó±ö: 0.019
- ½ð±Ò: 19579.9
- É¢½ð: 5130
- ºì»¨: 135
- ɳ·¢: 3
- Ìû×Ó: 4939
- ÔÚÏß: 990.5Сʱ
- ³æºÅ: 1489764
- ×¢²á: 2011-11-13
- ÐÔ±ð: GG
- רҵ: ½á¹¹¹¤³Ì
- ¹ÜϽ: ÍÁľ½¨Öþ
¡¾´ð°¸¡¿Ó¦Öú»ØÌû
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
|
ÓÉλÓÚ¶«°ØÁÖ¿µÄùµÒ¸ñÖݵİØÁÖÇÅÁº¹«Ë¾¶À¼Ò½¨ÉèµÄÓ㸹ʽÌúèì¼ÜÇÅ£¬ÔÚ19ÊÀ¼ÍÄ©µÄÊ®¶àÄêÖÐÖ÷Ô×ÁËÐÂÓ¢¸ñÀ¼¼°ÁÙ½üµØÇøµÄÖеȿç¶ÈÇÅÁºÊг¡¡£±¾ÎÄÔÚÓ㸹ʽÇÅÁºÔÚÔçÆÚÅ·Ö޵ķ¢Õ¹µÄ¿ò¼ÜÄÚ£¬½èÖúÓÚÔÚ1883Äê°ØÁÖÇÅÁº¹«Ë¾³ÉÁ¢Ö®Ç°ÓÉÎÒÃÇÌá³ö»òÕß½¨ÉèµÄÃÀ¹úÓ㸹ʽÇÅÁºµÄ´óÁ¿×¨Àûͼ¼þºÍÕÕÆ¬£¬¿¼²ìÁËÕâÖÖÏÖÏó¡£ ²Î¿¼ÁË3Â¥µÄ²¿·Ö³É¹û£¬±íʾ¸Ðл¡£ |

4Â¥2013-03-03 09:17:23
weikaihere
ľ³æ (ÕýʽдÊÖ)
- Ó¦Öú: 92 (³õÖÐÉú)
- ½ð±Ò: 1811.3
- É¢½ð: 66
- ºì»¨: 2
- Ìû×Ó: 406
- ÔÚÏß: 257Сʱ
- ³æºÅ: 865040
- ×¢²á: 2009-10-08
- ÐÔ±ð: GG
- רҵ: ·ÀÔÖ¹¤³Ì
2Â¥2013-03-02 00:19:34
lsy1018
ͳæ (³õÈëÎÄ̳)
- Ó¦Öú: 1 (Ó×¶ùÔ°)
- ½ð±Ò: 193.1
- Ìû×Ó: 25
- ÔÚÏß: 17.6Сʱ
- ³æºÅ: 1429010
- ×¢²á: 2011-10-06
- ÐÔ±ð: GG
- רҵ: ½á¹¹¹¤³Ì
¡¾´ð°¸¡¿Ó¦Öú»ØÌû
¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
small·Ç·É: ½ð±Ò+20, ¡ï¡ï¡ïºÜÓаïÖú 2013-03-03 16:29:48
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
small·Ç·É: ½ð±Ò+20, ¡ï¡ï¡ïºÜÓаïÖú 2013-03-03 16:29:48
|
ÕâÖÖλÓÚ¶«°ØÁÖ¿µÄùµÒ¸ñÖݵİØÁÖÇÅÁº¹«Ë¾¶ÀÁ¢½¨ÔìµÄÓ㸹ÐÎÌúèì¼ÜÇÅ£¬ÔÚ19ÊÀ¼ÍĩͳÖÎÁËÐÂÓ¢¸ñÀ¼µØÇøµÄÖеȿç¶ÈÇÅÁºÊг¡²»ÏÂÊ®Äê¡£ÔÚ°ØÁÖÇÅÁº¹«Ë¾1883Äê³ÉÁ¢³öÏÖ֮ǰµÄ´óÁ¿ÓйØÃÀ¹úÓ㸹ÐÎרÀû¡¢Í¼Ö½ºÍÕÕÆ¬µÄ°ïÖúÏ£¬±¾ÎÄ»ùÓÚÅ·ÖÞÔçÆÚÓ㸹ÐÎÇŵķ¢Õ¹µÄ±³¾°£¬¶ÔǰÊöÏÖÏó½øÐÐÁË̽ÌÖ¡£ Çë¶àÖ¸½Ì£¡ |
3Â¥2013-03-03 00:23:41
small·Ç·É
ͳæ (³õÈëÎÄ̳)
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 498.2
- ºì»¨: 1
- Ìû×Ó: 30
- ÔÚÏß: 6.5Сʱ
- ³æºÅ: 1996064
- ×¢²á: 2012-09-12
- ÐÔ±ð: GG
- רҵ: ½á¹¹¹¤³Ì

5Â¥2013-03-03 19:57:14









»Ø¸´´ËÂ¥
411327164