Before computers, we relied on t-squares, rulers & ink. Workers map Cambridge electrical system in 1950.


Before computers, we relied on t-squares, rulers & ink. Workers map Cambridge electrical system in 1950.
Before computers, we relied on t-squares, rulers & ink. Workers map Cambridge electrical system in 1950.
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One thought on “Before computers, we relied on t-squares, rulers & ink. Workers map Cambridge electrical system in 1950.

  • November 9, 2017 at 12:19 pm
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