Since the language of "transition and modulation" or "modulation and transition" seems obscure and the logical relation confusing, it is necessary to make a further disc.

This mining technology combined the fully mechanized mining with orthodox working face,and it layoutted irregular form and double unit face,adopted the rotational adjustment mining.

Disagreeing with some opinions in "Discrimination of note mutation and transition ", by Yongfu Liu, this essay holds that the real relationship between transition, including the exchange of tonality and modes, and note mutation is containment, compatibility, and subordination.

A high precision and rapid Azimuth Alignment method based on Rotation-modulation technology;