“机关炮”用英语怎么说

现在所有的战斗机都装备了机关炮.Now all the fighter planes are all armed with cannon.我们的战斗机都装备了机关炮.Our planes are all armed with cannon.这架机关炮的转速很高,每分钟可达到500转.This machine cannon has a high rotating speed reaching 500 revolutions a minut...