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2B20.40 -Equilibrium Tubes
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2B20.40x -Export Equilibrium Tubes
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2B20.60 -Hydraulic Press
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2B20.61 -Thumb Wars (Two Syringes)
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2B20.65 -Air Pressure Lift
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2B20.u1 -Pascal's Vases
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2B20.u2 -Center of Pressure Dam
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2B30.15 -Pop Can Collapse
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2B30.25 -Tin Can Collapse
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2B30.30 -Magdeburg Hemispheres
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2B30.30-2 -Flat Plate Magdeburg w/ Professor as Vacuum Pump
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2B30.30x -Export Magdeburg Hemispheres
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2B30.70 -Ping Pong Vacuum Cannon
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2B30.u1 -Glass of Water and Card
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2B30.u2 -Rubber Diaphragm on Glass Pipe
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2B40.14 -Archimedes' Principle
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2B40.15 -Finger in Beaker
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2B40.25 -Submarine in the Water
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2B40.30 -Cartesian Diver
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2B40.40 -Weight of Air
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2B40.59 -Density Ball
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2B40.60 -Hydrometers
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2B40.u1 -Lung Apparatus
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2B40.u2 -Buoyancy - Coke and Diet Coke
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2B40.u3 -Ball in Oil and Water
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2B60.30 -Self-Starting Siphon
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