As the primary power source, the HP5000 AC gasoline power station with a frequency of 50 Hz, an output voltage …
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Garmin 62S Handheld Navigator
The new Garmin GPSMAP 62s Handheld Navigator is a rugged design and IPX7 waterproof device featuring a quad helix antenna …
Hydrographic studies
Hydrographic studies science that studies the origin, conditions of occurrence, composition and patterns of movement of groundwater. The interaction of …