What does PPD stand for?
PPD stands for "persistent pigment darkening method"
How to abbreviate "persistent pigment darkening method"?
"persistent pigment darkening method" can be abbreviated as PPD
What is the meaning of PPD abbreviation?
The meaning of PPD abbreviation is "persistent pigment darkening method"
What does PPD mean?
PPD as abbreviation means "persistent pigment darkening method"
