用来设定不同的瞄准距离用的,通过表尺可以调节照门的高度,因为子弹的弹道近似于抛物线,而准星和照门的瞄准线是直线,为了使瞄准线在一定距离上与弹道曲线相交,它是略有倾斜的,而表尺调节照门就可以调节瞄准线的斜率,以适应不同的射程。
n. hindsight
misc. battle sight ; bar sight ; rear sight
手表尺寸虽小内部结构确非常复杂且精密,一点点小灰尘或是衣物纤维都会影响手表的走时。
Watch size is small and the internal structure is very complex and sophisticated, a little bit of dust or clothing fibers will affect the time of the watch.
从分析实际欧姆表测电阻全过程的误差出发,导出测量不确定度的算式,最后得出表尺最佳段范围。
Analyzing the error of ohmmeter in measuring resistance, the measurement formula of uncertainty is derived, and the best measuring range of ohmmeter is obtained.
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