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My robot is 2 feet tall and has 10 inch vacuum tubes. The vacuum tube close up when they are not being used. The robot will get cleaned when it goes back to the space station. All of my robot's circuitry is in its head. Questions. 1. The vacuum tubes will suck the dust up and a holding tank will hold it. 2. Little in lots of trips. 3. The robot will be cleaned after each trip.