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Simple Machine Projects
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Hardcover
from Gardners Books (May 7, 2015)
9781406289329 | details & prices | 192 pages | List price $123.35
About: A hands-on approach introduces young scientists to simple machines (levers; pulleys; ramps and wedges; screws; springs; wheels and axles).
About: A hands-on approach introduces young scientists to simple machines (levers; pulleys; ramps and wedges; screws; springs; wheels and axles).