【多选题】【消耗次数：1】
水准仪应满足的几何条件是（）
①
水准管轴平行于望远镜的视准轴
②
圆水准器轴平行于仪器的竖轴
③
十字丝的横丝垂直于仪器的竖轴
④
望远镜的视准轴不因调焦变动位置
参考答案：
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相关题目
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水准仪圆水准器轴平行于仪器竖轴的检验方法是：安置好仪器后，先调节圆水准气泡居中，然后将仪器绕竖轴旋转（ ）度，来观察气泡是否居中，以说明条件是否满足。
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