What does PTR stand for?
PTR stands for "Physikalisch Technische Reichsanstalt"
How to abbreviate "Physikalisch Technische Reichsanstalt"?
"Physikalisch Technische Reichsanstalt" can be abbreviated as PTR
What is the meaning of PTR abbreviation?
The meaning of PTR abbreviation is "Physikalisch Technische Reichsanstalt"
What does PTR mean?
PTR as abbreviation means "Physikalisch Technische Reichsanstalt"
