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image 2 - hose and context
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image 3 - some flow
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image 4 - low cost pump (bike pump)
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image 5 - pressurized gas delivery
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image 1 - nebulizer cap (athsma, vaccine)
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image 6 - humdinger
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image 8 - humdinger for teaching (simple electronics)
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image 9 - humdinger (connecting led array)
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image 10 - ed moriarty teaching
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image 11 - leds lighting
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image 12 - amy smith smiling
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image 13 - amy smith explaining
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image 7 - william kumkwamba with humdinger (side view)
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image 14 - william kumkwambe