That is usually the serial number - applied by the manufacturer in accordance with US Federal requirements, re: the National Firearms Act of 1934 as amended in 1968. This is the number by which all firearms are individually identified during all stages of their lives.
Gun Registration...
the bottom of the gun
the bottom number of a fraction (:
Inventory mark
I take it you mean on your blood pressure readings? The bottom number is the pressure the blood is returning to the heart.
The gun was made in 1966.
Could be part of the sn, could be an inspector mark
The denominator is the number on the bottom.
In a fraction, the numerator is the number on the top and a denominator is the number on the bottom.
That number is the amount of experience points they have.
number that comes front
On the bottom