... 精密垂准precise plumbing 环形控制网ring control network 粒子加速器测量particle accelerator survey ...
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针对环形控制网的网形特点，推导了各类观测量：测边、测方向和测高的极坐标误差方程式。
In this paper, the polar coordinate error equations on side, direction and height in the circular control worknet are derived making good use of the circular character of circular worknet.
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