Looking for thermionic emission? Find out information about thermionic emission. emission of electrons electron, elementary particle carrying a unit charge of negative electricity. Ordinary electric current is the flow of electrons... Explanation of thermionic emission
M stands for medium width. It depends if the 10M was on a pair of mens shoes or womens shoes. A 10M in Mens shoes would be a 11 in womens shoes.
These abbreviations stand mint never hinged,mint light hinged mint hinged.What does this mean you ask,MNH is a stamp that has not been violated ,it is like day it left P.O. post office.