What does HH stand for?
HH stands for "Hall-Héroult"
How to abbreviate "Hall-Héroult"?
"Hall-Héroult" can be abbreviated as HH
What is the meaning of HH abbreviation?
The meaning of HH abbreviation is "Hall-Héroult"
What does HH mean?
HH as abbreviation means "Hall-Héroult"
