Common linear motion devices, such as screw jacks and electric linear actuators, not only allow for vertical lifting but also multi-angle adjustment. Electric linear actuators are a good choice for angle adjustment of screw linear products. As an extension of the screw jacks, their design features a tail end cap with a pin holder and a pinhole head, making installation simple and convenient for multi-angle adjustment. The electric linear actuator's travelling nut is designed with a telescopic tube, which improves overall protection and stability. However, the overall height is also doubled, which limits its use in applications with limited installation space. Due to its anchor-mounted design, screw jacks require additional trunnions and footing to achieve angle adjustment.