① Genuine quality and simplified design, compact components, strong durability, customizable according to the designer's requirements, reducing design time. ② Model selection; when choosing a model, consider different loads, strokes, and series for varying requirements. ③ Spindle spacing selection: pay attention that when the spindle spacing exceeds the corresponding length, intermediate supports should be added. ④ Up/down action: smooth and quiet rotation with minimal noise. The gear and rack structure ensures excellent meshing, maintaining synchronization even in harsh environments.