double sided serpentine belt

A flat lifting belt is a specialized accessory made from durable materials like leather or nylon, designed to be worn around the waist during weightlifting exercises. Unlike traditional lifting belts, which are often wider at the back, flat lifting belts maintain a consistent width throughout, providing a more uniform support structure. This design allows for a greater range of motion while still offering the necessary abdominal and lumbar support needed for heavy lifts.


...

The conveyor belt's origins can be traced back to the late 18th century. Early versions were simple, consisting of leather belts or wooden slats powered by waterwheels or manual labor. However, it wasn't until the late 19th century, amidst the industrial revolution, that conveyor belts began to gain prominence. The introduction of steam and electric power allowed for more sophisticated designs, greatly increasing their efficiency and applicability.


...