| 1. | Consider key locks for windows easily accessible from the ground.
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| 2. | Under that scheme, one key locks a message, and a different key unlocks it.
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| 3. | :: I need to research, but my memory is that China introduced push-key locks.
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| 4. | _Stanford University uses a diverse system of key locks for the more than 200 buildings.
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| 5. | Mechanical key locks are vulnerable to bumping.
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| 6. | _Replacing thumb-turn window locks with key locks;
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| 7. | Sometimes the ignition key locks up.
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| 8. | PGP uses a dual-key mechanism in which one key locks a message and a different key unlocks it.
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| 9. | Since that time its facilities have only consisted of a garden bench and an operator control for the key lock.
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| 10. | Along the Mississippi River, the Army Corps of Engineers has reopened some picnic and observation areas near key locks and dams.
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