Device used to move automatic guns in a vertical plane. A reversing or reciprocating drive system provides motion.
喷枪在垂直面自动移动的装置，一个回动的或往复式的提供移动的装置。
Chapter four: on the plane vertical motion with delay.
第四章：关于带有时滞的飞机纵向运动问题。
In order to control the depth and the attitude of this kind of superspeed underwater vehicle, it is necessary to investigate the motion characteristics of the vehicle on a vertical plane.
为了对超高速水下航行器实施深度和姿态控制，研究其纵平面运动特性是必要的。
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