In the maintenance workshop of the railway vehicle factory, it is a place used for maintenance operations on railway vehicles. Here, the screw jack is one of the commonly used tools, with a large support capacity, fast lifting speed, and frequent use.

The railway train needs maintenance every once in a while. As it slowly enters the inspection trench, the screw jack appears, like a steady strongman, supporting a corner of the carriage and opening up a "battlefield" for the maintenance of its bottom components. This jack has delicate threads and a solid shaft, and every rotation is filled with a blend of strength and beauty.

The workers gathered around, their eyes focused, and their wrenches and tools shuttled between the chassis parts. From loosening corroded bolts, to inspecting the wear of wheelset bearings, to replacing aging air pipelines, every step relies on the stable support provided by the screw jack. It eliminates the hidden worry of the carriage sinking, allowing the operators to perform their skills with ease. The vernier caliper accurately measures the gap between components, and the flaw detector meticulously scans hidden cracks, leaving no room for any damage.

The high precision of the screw jack is an excellent partner for the strict standards of railway maintenance. The bottom structure of the train is complex, with numerous components, and even a tiny difference may cause operational hazards. And with the precise thread of the screw, it can fine tune the lifting height, accurately control the carriage posture, ensure that the horizontal error approaches zero, and lay a solid "reference surface" for maintenance operations.

In this small area, the screw jack silently shoulders the responsibility of safety, accompanied by oil and sweat, witnessing the train's rebirth and embarking on a thousand mile journey again, continuing to write a chapter of safe galloping on the railway tracks. It is also an unknown hero behind the scenes, using precision as a blade to protect the safe travel of every train.