a double BA degree system
a two-degree of freedom system
beam-multiple degree of freedom system
circular degree detection system
congruence system of first degree
degree of perfection of control system
degree of satisfaction target system
differential system with odd degree
double degree-of-freedom control system
equivalent single degree of freedom system
equivalent single degree-of-freedom system
equivalent single-degree-of-freedom system
generalized single-degree-of-freedom system
higher-degree degenerate polynomial system