Thousands of fuel elements in pebble-bed reactor are lifted one by one from the bottom to the top of the core by pneumatic conveying every day. Any failure in the transportation process may lead to a safety accident. In order to ensure the safe and reliable operation of the reactor. it is important to model and analyze the motion process of the fuel element. https://www.bekindtopets.com/hot-sale-Osborne-RN3-Big-Wheel-Nursery-Hog-Feeder-best-save/