| Autopilot (4) |  |
| Federal aviation administration (1) | |
| Flight control system (2) | |
| Flight recorder (1) | |
| High frequency (1) | |
| Outside air temperature (2) | |
| Thin-film transistor (1) | |
| Unmanned aerial vehicle (7) | |
| Autopilot (4) | |
| Federal aviation administration (1) | |
| Flight control system (2) | |
| Flight recorder (1) | |
| High frequency (1) | |
| Outside air temperature (2) | |
| Thin-film transistor (1) | |
| Unmanned aerial vehicle (7) | |
and cools in response to the outside air temperature it expands and contracts causing the bellows to do the same.
That means any slight shift in an office building s air conditioning or the natural outside air temperature during the course of a day would be more than enough to activate the chemical in the bellows.
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