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74The Development and Impact of the First Passenger Elevator
While dumbwaiters have been used in construction and homes for thousands of years, the passenger elevator is a relatively new device that is less than 200 years old. One of the biggest obstacles that...
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74Dumbwaiters and their Uses
The stairs can be a very dangerous place in a home and falls on the stairs is the leading cause of accidental death among the elderly. Falls occur on the stairs everyday and are sometimes caused by attempting...
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