1592954096000 1312632483000 term-87930 1616541435075 1312632586000 1616290447364 adlib fitz-online adlib-term-87930 b69fe99a-a2de-3839-8bb2-7d9c89287a94 2 1 scope note Instruments for measuring the frequency of alternating currents. reference term-87929 adlib-term-87929 ce68e19a-0dd3-3ae2-a7b9-b538668329f0 frequency meter V.TN.AFU.ALO.AFU.AFU.AXC 1 code V.TN.AFU.ALO.AFU.AFU.AXC 1 frequency meters reference term-87944 adlib-term-87944 aafbf805-06fa-3a8a-a349-c06d07ba67f3 <electricity measuring devices> frequency meters term