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50-60cm high, 18-20cm diameter top support

, the building is used for the bottom and top supports of the scaffolding. Both the top and bottom supports are adjustable for the integrity of the screw. The screw consists of a screw, a nut, a ball, a preloader, a commutator and a dust protection device.Its function is to convert rotary motion into linear motion, which is a further extension and development of Akem screw. An important aspect of this development is the change from sliding to rolling motion of the bearings.

The upright pole and the crossbar connecting the upright pole are connected by a roulette wheel at the position where the upright pole is connected to the crossbar, with a jack on the roulette wheel and a crossbar plug perpendicular to the crossbar at both ends of the crossbar. The crossbar plugs and the wheels connect the crossbar to the riser bar in a way that is not only very stable but also easy to install. When erecting wheeled scaffolding, the crossbar plugs can be inserted directly into the sockets of the wheel, and the connection of the plugs and sockets is self-locking, making it more stable during construction. The connection structure of the plugs and sockets is self-locking, making it more stable during construction.

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