The inclination, or tilt, of Earth's axis also varies periodically, moving between 22 degrees and 5 degrees.

Influences of axis inclination, length, clamping Angle of anchorage, roughness and bonding degree of interface on the displacement of anchorage and repose stability of rock mass were explored.

Taking the JJY model spectrometer as an example, the focusing and inclination of optical axis are discussed in this paper.