What does PPD stand for?
PPD stands for "predominant particle diameters"
How to abbreviate "predominant particle diameters"?
"predominant particle diameters" can be abbreviated as PPD
What is the meaning of PPD abbreviation?
The meaning of PPD abbreviation is "predominant particle diameters"
What does PPD mean?
PPD as abbreviation means "predominant particle diameters"
