What does PTB stand for?
PTB stands for "Proposed Test Borings"
How to abbreviate "Proposed Test Borings"?
"Proposed Test Borings" can be abbreviated as PTB
What is the meaning of PTB abbreviation?
The meaning of PTB abbreviation is "Proposed Test Borings"
What does PTB mean?
PTB as abbreviation means "Proposed Test Borings"
