in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar heat collectors

Full Title

Solar heat collectors using working fluids > in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar heat collectors

Classification Context

Section:

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

Class:

HEATING; RANGES; VENTILATING

Subclass:

SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS