H means tritium.
- 3H Movement, a liberal Turkish youth organization
- 3H Biomedical, a Swedish biotechnology company
- Mu-3H, a model of Mu (rocket family)
- Yuri 3H, a Broadcasting Satellite (Japanese)
- SSH 3H (WA), alternate designation for Washington State Route 27
- Old Natchez Trace (230-3H); see Old Natchez Trace segments listed on the National Register of Historic Places
See also
Search for "3h" on Misplaced Pages.
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