The most widely used lock in the United States today for exterior building doors and interior room doors is:
A. The disc-tumbler lock
B. The pin-tumbler lock
C. The lever lock
D. The wafer lock
E. None of the above
The most widely used lock in the United States today for exterior building doors and interior room doors is:
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The most widely used lock in the United States today for exterior building doors and interior room doors is:
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