What does CODE 12 stand for?

CODE 12 stands for "Poisonous Gas"

How to abbreviate "Poisonous Gas"?

"Poisonous Gas" can be abbreviated as CODE 12

What is the meaning of CODE 12 abbreviation?

The meaning of CODE 12 abbreviation is "Poisonous Gas"

What does CODE 12 mean?

CODE 12 as abbreviation means "Poisonous Gas"