Conex Box
Conex Boxes are also known as shipping containers, and are the cargo containers that allow goods to be stored for transport in trucks, trains and boats, making intermodal transport possible. They are typically used to transport heavy materials or palletized goods. Conex Boxes are used to protect transported cargo from shock and bad weather conditions, as well as keep storage products intact. They were first used in the 1950s and were initially developed for the purpose of commercial shipping.
https://www.shippingcontainertool.com/what-is-a-conex-box
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