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Bolt (1)
BOLT (1)

Definition: A long, narrow piece of metal that you slide across the inside of a door or window in order to lock it.
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* All six elements should be in.


1. Purposeful and necessary.

2. Strong and securely fixed.

3. Placed or positioned appropriately.

4. Length and narrowness are adequate. And metal has no strange protrusion that can cause an injury to user.

5. Clean, neat and tidy, without a foreign substance or object on, that can cause a problem.

6. Serves purpose(s), as hoped for. That is, will be easy to operate.
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See perfect LOCK (1).

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