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
Answer: A
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
Answer: A