What does ob x m  stand for?

ob x m  stands for "Overload boxing x mil"

How to abbreviate "Overload boxing x mil"?

"Overload boxing x mil" can be abbreviated as ob x m 

What is the meaning of ob x m  abbreviation?

The meaning of ob x m  abbreviation is "Overload boxing x mil"

What does ob x m  mean?

ob x m  as abbreviation means "Overload boxing x mil"