What does ELF stand for?

ELF stands for "Extremely Low Frequency"

How to abbreviate "Extremely Low Frequency"?

"Extremely Low Frequency" can be abbreviated as ELF

What is the meaning of ELF abbreviation?

The meaning of ELF abbreviation is "Extremely Low Frequency"

What does ELF mean?

ELF as abbreviation means "Extremely Low Frequency"