acoustic measuring unit
alternating-current reference-voltage measuring unit
bridge-type measuring unit
digital distance measuring unit
nuclear radiation measuring unit
identical unit or proportional unit of the body
time-rock unit =time-stratigraphic unit
2-dofs inertia pendulum
adaptive inertia weight
added moment of inertia
added moment of mass inertia
added products of inertia
Additional inertia force
Adjustable Inertia Ratio
apparent thermal inertia