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Speed in opening.
Note: It StarTrek, the moving doors took three people to operate.
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Putsa ako nga kailangan ko 2..
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Once the elevator's computer has sensed you've reached the 65th floor, electric motors open both the elevator and lobby doors. If you should happen to hesitate between the doors, mechanical and electrical sensors should prevent the doors from closing. If there is no elevator car behind a lobby door, the lobby door should not open. Elevators have a significant number of redundant systems and safety features built into them, including emergency brakes, call boxes and shock absorbers. The chances of elevators snapping all of their cables and plummeting to the ground are virtually zero. Read more here :
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