| English thesaurus | |||
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| hydraulic | |||
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| Helping You Downtown Roam Around | |||
| code for the transmission of basic hydrological data | |||
| Hierarchical Yet Dynamically Reprogrammable Architecture | |||
| hydrographic digital positioning and depth recording system | |||
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| Hya (Гидра Vosoni) | |||
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hydra : 5 phrases in 2 subjects |
| Meteorology | 1 |
| Natural sciences | 4 |