They are the curvature corrections for recording time at the determined zenith distances when a star passes the prime vertical and the meridian circle.
卯酉方向天顶距的星径曲率改正以及子午方向天顶距的星径曲率改正。
For open or semi-open layout of the pump, general pump and prime mover so that the axis and the vertical axis of pipe gallery.
对于露天或半露天布置的泵，一般使泵与原动机的轴线与管廊轴线垂直。
For open or semi-open layout of the pump, general pump and prime mover so that the axis and the vertical axis of pipe gallery.
对于露天或半露天布置的泵，一般使泵与原动机的轴线与管廊轴线垂直。
应用推荐