首先，把握系统总体结构的设计。

First, grasps the design of overall system structure.

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结合系统总体结构，对硬件设备进行了布置和选型。

Integrating the system architecture, the hardware arrangement and lectotype of system are discussed in detail.

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分析了卸荷系统对精密导轨精度的影响，设计了卸荷系统总体结构。

Analyzes the unloading system influence to the precision of ultra-precision's guide, and designs the unloading system.

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