What does PPD stand for?
PPD stands for "Positive Pressure Demand"
How to abbreviate "Positive Pressure Demand"?
"Positive Pressure Demand" can be abbreviated as PPD
What is the meaning of PPD abbreviation?
The meaning of PPD abbreviation is "Positive Pressure Demand"
What does PPD mean?
PPD as abbreviation means "Positive Pressure Demand"
