研究了起重机载荷摆振模型在简化过程中所产生的相对误差，得到了相对误差公式。
The paper studied the relative error which appear because of abbreviation for the model of crane load sway, the relative error equations are obtained too.
分析了角锥棱镜的制造角差、面形误差和测量过程中角锥棱镜的偏摆、俯仰、滚转对直线度测量的影响。
The effects on straightness measurement are analyzed for the cube-corner retroreflector with angle errors, surface errors, yaw, pitch and roll.
此外，还分析数控模型以及回摆间隙角对加工误差的影响。
Besides, the influence of the machining error by the nc model and the clearance Angle of the sway back are analyzed.
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