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Even if the spiral is around a 18" pipe one could have a dumbwaiter inside it. My parent's house had a dumbwaiter in the downstairs bathroom to the laundry on the second floor.
The pneumatic elevator is cool because if you use an accumulator It doesn't take a noisy fan to recharge it. (30 gallon steel drums buried under a concrete slab for air storage)
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Necessity is the mother of invention, but simplicity is it's favorite aunt --Amish proverb
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