以下为句子列表：
英文: The results show that the penetrability of powder loads can be improved when suitably reducing bulk density and grain size of gun propellant, increasing nitrogen content of NC and choosing oblate spheroid explosive respectively under the constant test con
中文: 结果表明，在其它试验条件不变的条件下，适当降低发射药堆积密度、适当提高发射药中硝化棉(NC)含氮量、选用恒面燃烧的扁型药、降低发射药粒度均有利于提高射钉的穿透能力。
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