The picture shows a simple outdoor stage awning structure composed of manual crank stands and lighting trusses. The trusses are made of aluminum alloy and connected into a quadrilateral shape through joints and bolts. They feature high strength, light weight, and are easy to assemble and disassemble. They are widely used in events such as performances and exhibitions to hang lighting, audio, curtains, and other equipment. The black devices at the bottom are heavy - duty manual crank stands, which can adjust the height of the trusses and are equipped with wheels for easy movement.
