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1H or 1-H may refer to:
- 1H, a number of chemical compounds with one hydrogen atom
- 1H, a grouping within an Astronomical catalog
- 1H, an SES satellite launched June 16, 1999
- 1H, a model of Nissan H engine
- 1H NMR, a type of Proton NMR
- 1 H. Cas, a variant notation for AR Cassiopeiae
- UH-1H, a type of Bell UH-1 Iroquois
- Campath-1H, a brand of Alemtuzumab
- Ardiden 1H, a model of HAL/Turbomeca Shakti
- SSH 1H, alternate name for Washington State Route 534
- 1H, one hour
- 1H Year, 1st Half of year etc.
| disambiguation page lists articles associated with the same title formed as a letter-number combination.
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