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Old 09-28-2021, 03:54 AM   #177 (permalink)
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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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