character of a light signal

section a-a a-a

characteristic of a developable surface

characteristic of a family of surface

characteristic of a field

characteristic of a logarithm

characteristic of a process

characteristic of light

characteristic of light radiation

characteristic of signal

characteristic signal of coal rock

reducibility of a characteristic form

characteristic signal of the target

uniformity of a light source

Range of a signal

in rear of a signal

in approach of a signal

in advance of a signal

A-A-A conjugation structure