"Design Patterns" co-author Ralph Johnson explains the overall structure of parallel programming, what kinds of problems it solves, and tell you how you can learn more about it.
Telecentric lens has parallel chief ray with its optical axis and is ideal for co-axial lighting.
远心镜头拥有与它的光轴平行的主光线，同轴照明是非常理想的。
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At the end of this paper, co-simulation method was introduced to the area of parallel robot accuracy analysis, and come up with ways to improve the running accuracy of parallel robot.