Bearing truck from aluminum strap
Ohm's Law Pie Chart
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Single Axle Flatbed Utility Trailer - Johnson Trailer Co.
So, I changed my dream. Getting into a huge companies like Hyundai and Samsung was the answer. Now I'm studying mechanical engineering and I'm doing well!
Hold down clamps
Parts tumbler from Fred Nelson Fabrication http://frednelsonfabrication.com/TumblerOrderPage.htm
Top view: Casters and Angle iron or L-channel of a Lift/Elevator/Ladder/Barn Door Mechanism Etc.