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- Windmill (7108 bytes)
8: ...ave evolved into more sophisticated and [[efficiency|efficient]] wind-powered water pumps and [[power]...
14: ...arried downward through a pole or rod to the pump cylinder below.
16: ...ich generally went through the drop pipe to the [[cylinder]] below. The pump jack provided a means fo...
18: ... down deep into the well, terminating at the pump cylinder below the lowest likely [[groundwater]] lev...
65: ...blished by The Centre for Alternative Technology. Machynlleth, Powys. Wales SY20 9AZ. Telephone: (01654) 702400...
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