Planetary Gear Unit for Students, mall-size unit for explaining the principle of planetary gear. By setting the internal, sun and pinion gears at different motions
Eudiometer, Demonstrate the combining volume ratios of gases, Platinum electrodes included, Long, sturdy glass tubes have platinum electrodes sealed at the closed end with a 2 mm arc gap, Tubes are marked with a permanent brown scale in 0.1 or 0.2 mL divisions, Size: 100ml
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