What does the safety label warning of the stacker mean?

The safety label warning concerning the stacker that indicates it is forbidden to stand between the telescopic mast and the car body is crucial because this area is particularly dangerous during operation. The telescopic mast can move, and any individual standing in that space risks injury from crushing or pinching if the mast were to shift or operate unexpectedly. This makes the area a high-risk zone where safety precautions are essential to prevent accidents.

While all other options highlight important safety practices, none address the specific danger presented by the space between the telescopic mast and the car body. Exceeding the weight limit is important for load safety, using personal protective equipment is universally applicable to many work situations, and ensuring proper training is vital for operational safety. However, the warning about standing in a specific hazardous area is pertinent and emphasizes a direct and avoidable risk associated with operating the stacker.