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invulnerability
Scientific American 1894-07-21
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(282 x 432)
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(388 x 594)
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(650 x 993)
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Created on
Monday 16 November 2009
Visits
967
Tags
construction
,
invulnerability
,
iron
,
protection
,
robbery
,
steel
,
strength
,
theft
Albums
General Magazines
/
Science and Technology Magazines
/
Scientific American
Hardening composite plates for bank vaults by immersion in the Hudson River. hardening to make burglar-proof vaults.
Source: Steve Kirch, collector, and creator of a great
website about SCIENTIFIC AMERICAN
in the past
Restoration by: magscanner
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