The principle of the pin-tumbler lock can be traced back historically to:

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answerhappygod
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The principle of the pin-tumbler lock can be traced back historically to:

Post by answerhappygod »

The principle of the pin-tumbler lock can be traced back historically to:

A. Egyptians more than 4000 years ago
B. The Civil War period
C. The late eighteenth century
D. 1905
E. World War I
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