研究浮动机对一定口径范围内大口径步兵自动武器的通用性，对于通用枪架的设计具有重要意义。
Study of generality of floating machine for a certain range of large caliber infantry automatic weapons is of great importance to the design of general-purpose mount.
喷嘴内腔孔径应和喷嘴出口口径有一定的匹配关系。
Internal diameter nozzle and nozzle exit diameter should to be a certain degree of matching relations.
扫描镜是光机扫描型空间遥感器的重要组成元件。文章针对目前空间遥感器上应用的大口径轻量化扫描镜，从材料和制作方法方面进行了一定的技术研究。
The scan mirror is an very important part of a space remote sensor. This paper discusses the material development and the manufacture method of the big lightened scan mirrors.
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