A point determined by resection on a plane table is called ............

The longitudinal section of the surface of bubble tube is ............

The ratio of the distances at which a stated length can be distinguished by the telescope and the human eye, respectivel…

During secular variation of magnetic meridian at different places ............

For the construction of highway (or railway) ............

Ramsden eye-piece consists of ............

A lemniscate curve between the tangents is transitional throughout, if the polar deflection angle of its apex is equal t…

In an adjusted level, when the bubble is central, the axis of the bubble tube becomes parallel to ............

The "point of curve" of a simple circular curve is ............