They provide new freedoms in system design, simplifying the structure of system and reducing the size of system greatly.
这些元件给光学系统设计提供了新的自由度，并大大地简化了系统的结构和减小了系统的尺寸。
Simplifying the air floated structure as a single freedom rigid body and spring system, the inherent period of heaving and some kinetic properties are presented.
按单自由度刚体弹簧体系求得了气浮结构升沉运动的固有周期，并对气浮结构的动态特性进行了分析。
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