![](https://nthumb.tpgimages.com/mid2_ocom_img/dW5pdmVyc2FsX2ltYWdlcw==/20120511_3_rm/2012051415/top_20120514150303_2411.jpg/TOP09096024.jpg)
Shield used during digging of Thames Tunnel (1825-1843) which allowed 12 men to excavate simultaneously. Patent for this first tunnelling shield taken out by Marc Isambart Brunel in 1818. Woodcut, 1842
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Details
Creative#:
TOP09096024
Source:
達志影像
Authorization Type:
RM
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須由TPG 完整授權
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