How to make mini Excavator machine motor | Science project $35 dollar

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How to make mini Excavator machine motor
Science project $35 dollar
How to make a mini tractor

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**Materials:
- 3 dc gear motor N20 3.7v 1000rpm
- 1 dc gear motor N20 3.7 60rpm
- 1 dc gear motor 12v 8rpm
- Transmit and Receiver of rc excavator

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