What does H/X mean in Governmental & Military

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All H/X meanings

What does H/X stand for?

H/X stands for "heat exchanger"

How to abbreviate "heat exchanger"?

"heat exchanger" can be abbreviated as H/X

What is the meaning of H/X abbreviation?

The meaning of H/X abbreviation is "heat exchanger"

What does H/X mean?

H/X as abbreviation means "heat exchanger"