What does IRPM stand for?
IRPM stands for "Illustration of Room and Pillar Mining"
How to abbreviate "Illustration of Room and Pillar Mining"?
"Illustration of Room and Pillar Mining" can be abbreviated as IRPM
What is the meaning of IRPM abbreviation?
The meaning of IRPM abbreviation is "Illustration of Room and Pillar Mining"
What does IRPM mean?
IRPM as abbreviation means "Illustration of Room and Pillar Mining"
