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the hooks are on the end of a knuckle boom for picking and placeing the weights , the orange and blue thingees are motorized carts for driveing them about , yes we use transdures baced load cells for weighing most any thing nowadays , beams are a thing of the past though there are still a few around ,
there are also hydrolic weighing systems out there , hell i even saw a prototype for a system that uses refracted lazer light , didn't work but cool consept
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"Success is getting what you want. Happiness is wanting what you get. "
Brother Dave Gardner
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