What does PHM stand for?
PHM stands for "Passive Hydrogen Maser"
How to abbreviate "Passive Hydrogen Maser"?
"Passive Hydrogen Maser" can be abbreviated as PHM
What is the meaning of PHM abbreviation?
The meaning of PHM abbreviation is "Passive Hydrogen Maser"
What does PHM mean?
PHM as abbreviation means "Passive Hydrogen Maser"
