题目：
根据直线的起点坐标、直线的水平距离及方位角，计算直线的终点坐标，称为（）。
（A）坐标反算；
（B）坐标正算；
（C）方位反算；
（D）边长反算。
答案：
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参考答案：润滑轴承表面；较高的油压
根据直线的起点坐标、直线的水平距离及方位角，计算直线的终点坐标，称为（）。（A）坐标
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题型：单项选择题
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