identical unit or proportional unit of the body
time-rock unit =time-stratigraphic unit
(lime+ZnSO 4+YN)combined regulator
3-terminal positive voltage adjustable regulator
a new graphic display regulator
A voltage space vector speed regulator
AC chopping voltage regulator
AC frequency conversion speed regulator
AC motor speed regulator
AC power source voltage regulator
AC proportional and resonant regulator
AC speed regulator drive