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  • 18
    B
  • 20
    E
  • 14
    storage batteries
  • 25
    B
  • 23
    A
  • 24
    A
  • 15
    voltage
  • 17
    expensive
  • 22
    B
  • 21
    C
  • 19
    D
  • 16
    DC motors
  • 26
    C
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