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.
铝合金结构，由盖、夹钳、环焰灯、连接装置、带刻度圆筒和温度计组成。
Consists of an aluminum alloy still with lid and clamp assembly, ring burner, connection apparatus, graduate cylinder and thermometers.
松开刻度固定环，拆卸旋转指示器总成。
Loosen scale retaining ring and remove turn indicator assembly.
本发明描述了一种旋转编码器装置(2)，其包括编码器刻度或旋转环(30)以及编码器刻度读取器。
A rotary encoder apparatus (2) is described that comprises an encoder scale or ring (30) and an encoder scale reader.
松开刻度上的固定环，旋转指示器刻度使其对齐手轮上的「0 」 。用手紧固刻度上的固定环。不要过紧。
Loosen the scale retaining ring and rotate the turn indicator scale to align with the " 0 " on the handwheel. tighten the scale retaining ring by hand. do not overtighten.
刻度盘的误差，是子午环固有的仪器误差之一，它直接影响了天体赤纬的测定精度。
The errors of the circle of a meridian circle will immediately affect the precision in determining celestial bodies' declinations.
刻度盘的误差，是子午环固有的仪器误差之一，它直接影响了天体赤纬的测定精度。
The errors of the circle of a meridian circle will immediately affect the precision in determining celestial bodies' declinations.
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