The paper, with a method of "Hexoa" , discusses the effect of the projection of straight line by the changing of parameter of the relative position on ellipsoid of gyration.
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廖继蓉.有关参数的改变对直线之投影的影响[J].重庆工商大学学报(自然科学版),1988,(2): . On the Effect of the Projection of Straight Line By Changing of Parameter[J]. Journal of Chongqing Technology and Business University(Natural Science Edition),1988,(2):