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TIL Between 1920 and 2000 the man hours required to produce a ton of steel reduced by a factor of 1000.

by M. Amaar Tahir about 3:12 AM

http://ift.tt/1U3mI4P

Submitted August 20, 2017 at 12:20PM by kezzaNZ http://ift.tt/2wue1hj

TIL Between 1920 and 2000 the man hours required to produce a ton of steel reduced by a factor of 1000.

TIL Between 1920 and 2000 the man hours required to produce a ton of steel reduced by a factor of 1000.

Reviewed by M. Amaar Tahir on 3:12 AM Rating: 5

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