What does zn stand for?
zn stands for "Ziehl-Nielson"
How to abbreviate "Ziehl-Nielson"?
"Ziehl-Nielson" can be abbreviated as zn
What is the meaning of zn abbreviation?
The meaning of zn abbreviation is "Ziehl-Nielson"
What does zn mean?
zn as abbreviation means "Ziehl-Nielson"
