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• advice on identifying underlying causes of difficulty and how to tackle them
12 x Coloured tennis balls
Conforms to current European safety standards
Knot a problem
The Philip Harris formula model sives student a simple
Decade Resistance Unit Age 4-5 • advice on identifying underlyingFor use as an accurate potential divider, ratio arm etc. This unit employs high stability metal film resistance elements having superior characteristics to traditional wire wound coils. It is equally suitable for a. c. or d. c. use. The individual decades are series connected, each having switched positions of 0 to 9, and are mounted in line with 4mm socket terminals linked to the ends of the chain. The top panel is clearly marked with the resistance
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