Using these formulas, the ulterior ballistic performance variation of the gun in different wearing degree can be predicted by measuring the land diameter 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。

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Traversing their land is a natural gas pipeline, 36 inches in diameter and 6 feet underground.

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He plans to put the storage bags through smaller scale land-based tests, with four-meter-diameter bags, to prove that his calculations are right.

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