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DSC04301
  DSC04302.JPG - The right crank must be pushed into the machine to reset the result digits to zero. The left lever (here in position A = addition) must be moved to S when entering the minuend of a subtraction. The plastic wheels can only be rotated downwards.  
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The right crank must be pushed into the machine to reset the result digits to zero. The left lever (here in position A = addition) must be moved to S when entering the minuend of a subtraction. The plastic wheels can only be rotated downwards. Download
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