MRC:
Those unusual or unique characteristics or qualities of an item not covered in the other requirements and which are determined to be essential for identification.FEAT
Special Features:
0 to 2 mc range, pulse and am signal; power requirements: 115 vac, 60 hz, 3 phase, 28 vdc; two items, panel mounted without carrying case; aluminum housing, black anodized panel, yellow painted chassis; items may be used in or out of panel; components: waveform analyzer and programmer, electronic signal command
MRC:
A feature of the item of supply which must be specifically recorded when the reference number covers a range of items.ZZZY
Reference Number Differentiating Characteristics:
As manufactured by texas instruments inc., ref no. 498010-1