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The average shower uses 20 gallons of water

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User: SchizoChronic

Categories: Makelearningfun

Exercise for strength

Melanin is also responsible for skin and hair colour

Romans used Cranks to power sawmills as early as the 3rd Century

The Romans used Cranks to transfer power from waterwheels to saw-blades in the 3rd

Multitasking masters

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