What does OPB stand for?
OPB stands for "Oxidizer Preburner"
How to abbreviate "Oxidizer Preburner"?
"Oxidizer Preburner" can be abbreviated as OPB
What is the meaning of OPB abbreviation?
The meaning of OPB abbreviation is "Oxidizer Preburner"
What does OPB mean?
OPB as abbreviation means "Oxidizer Preburner"