A change point is ............

The angle of intersection of a curve is the angle between ............

The diaphragm of a stadia theodolite is fitted with two additional ............

The constant vertical distance between two adjacent contours, is called ............

When the magnetic bearing of the sun at noon is 185°20', the magnetic declination will be ............

In profile leveling, staff readings on two neighbouring pegs 20 m apart are 1.200 and 1.000 respectively. Therefore the …

The method of measuring distance by pacing is chiefly used in ............

A plain scale is used to read ............

In an optical square, the angle between the first incident ray and the last reflected ray is ............