It's shorthand for Radio Frequency. In the electromagnetic spectrum that is associated with the propagation of radio waves.
00:45, 26 November 2012
A three phase connection where each phase is connected in ...
The plugs have three round pins arranged in a triangle, ...
MSDS: Material safety data sheet (MSDS) is a form ...
The NEMA 5-15 plug has two flat parallel blades like NEMA ...
A dangerous condition in which contact or equipment failure ...
is an innovative gadget that generates electricity ...
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