在过去几十年里,用于装甲战车的中口径机关炮一直处在不断的演变过程中,包括其作战性能、工作原理以及相应的使用方式。本文简要回顾造成机关炮需求愈来愈盛的主要原因,以及这种需求对最佳机关炮口径的选择和其它方面性能的影响,并重点介绍几种当前装甲战车用机关炮的主要技术特点。 In the past few decades, the medium caliber guns used in armored combat vehicles have been constantly evolving, including their combat capabilities, their working principles, and corresponding usage patterns. This article briefly reviews the main causes of the growing demand for machine guns and their impact on the selection and other aspects of optimal machine gun caliber and highlights the main technical features of several current armored combat vehicle guns .