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and store equipment
and the dynamics of a watershed
This model provides a tangible representation of various molecules
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a Three Cornered Mirror can be utilized to experiment with reflection and refraction
DC Electronic Recording Timer 8V to 12V 2 Speed model and store equipmentThis DC Electronic Recording Timer generates 25 & 50Hz from an AC or DC source or 12V PlugPak, and its microprocessor and slide switch make frequency selection easy. The device has a heavy diecast base and rubber feet, allowing it to vibrate at 50Hz without clamping, and can be held on a retort stand for 'Falling' experiments. Comes with a 30m roll of paper and 25 carbon discs for marking. The Kit Includes: 1 x Recording timer, with hammer and
US$ 61.25
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US$ 29.95
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US$ 135.00
