What does the slogan on the armored vehicle mean?

It's like this: on armored vehicles, vehicles stay in a horizontal straight line, and any part exceeds the basic outline of locomotive and rolling stock clearance, or when vehicles pass through a curve with a radius of 300 meters, the calculated width of equipment exceeds the basic outline of locomotive and rolling stock clearance, which belongs to out-of-gauge goods.

According to the degree of cargo overrun, the overrun equipment is divided into three levels: first-class overrun, second-class overrun and super-overrun.

1. First-class overrun: the height from the rail surface 1250 mm or above, but not exceeding the first-class overrun limit;

2. Second-level overrun: exceeding the first-level overrun but not exceeding the second-level overrun, and the height from the rail surface is from 150 mm to less than 1250 mm but not exceeding the second-level overrun;

3. Over-limit: exceeding the second-level limit. thank you