What does USB stand for?
USB stands for "Upflow Sludge Bed"
How to abbreviate "Upflow Sludge Bed"?
"Upflow Sludge Bed" can be abbreviated as USB
What is the meaning of USB abbreviation?
The meaning of USB abbreviation is "Upflow Sludge Bed"
What does USB mean?
USB as abbreviation means "Upflow Sludge Bed"
