Using these formulas, the ulterior ballistic performance variation of the gun in different wearing degree can be predicted by measuring the landdiameter wear figure.
应用这些公式，可通过静态测量火炮内径改变量的方法确定不同磨损程度火炮的内弹道性能变化。
2
Even though Mars has almost the same land surface area as Earth, it has only half the diameter and less density than Earth - possessing roughly 15% of Earth's volume and 11% of its mass.