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Big robot chassis with engines

Chassis specially designed to make a crawler robot able to move on rough terrain and able to transport a load of about 7 kg.
The frame, the gears, the suspension struts, and the wheels are made of aluminum.
The upper part of the frame has many fixing holes and some slots for the installation of electronics and accessories such as a miniature RC servo (on the front and back) and a medium-sized RC servo (in the central part).
It
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