松开赤经兼小时刻度环的定位螺丝后把赤经兼小时刻度环“0小时”位置对准赤经指示箭头。
Set "0 hour" on the R. A. and hour graduation ring to the R. A. indicator after loosening the graduation-ring setscrew.
分析了牛顿环实验中的对准误差，用不确定度评定进行了修正。
This article analyzes the alignment errors in Newtons Ring Experiment and, by using evaluation of uncertainty, revises the errors.
同助手一起将挡风玻璃放置在挡风玻璃开口上。对准挡风玻璃底部至支撑隔环的参考记号。
With aid of a helper, position windshield over windshield openinAlign reference marks at bottom of windshield to support spacers.
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