What does NBS-4 stand for?
NBS-4 stands for "Older Primary Frequency Standard"
How to abbreviate "Older Primary Frequency Standard"?
"Older Primary Frequency Standard" can be abbreviated as NBS-4
What is the meaning of NBS-4 abbreviation?
The meaning of NBS-4 abbreviation is "Older Primary Frequency Standard"
What does NBS-4 mean?
NBS-4 as abbreviation means "Older Primary Frequency Standard"
