基本解释[军事学]枪闩英汉例句双语例句When looking ahead from the gun breech, if the Gatling gun rotates in clockwise direction, the left guide rail of the bolt carrier should be in higher position;从炮尾方向向前看，如果转管炮是顺时针旋转，则左侧导轨适宜布局得高一些；breech bolt更多例句专业释义军事学枪闩