- NODE- a point at which lines or pathways intersect or branch; a central or connecting point.
- SMOKE CURTAIN- A barrier that restricts the spread of smoke.
- GRANDFATHERED- a provision in which an old rule continues to apply to some existing situations while a new rule will apply to all future cases.
- VARIANCE- the state, quality, or fact of being variable,divergent, different, or anomalous.
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