Closeup of vacuum tubes from solar water heating system.
Palabras clave
solar,
heater,
water,
energy,
alternative,
business,
mobile phone,
change,
clean,
closeup,
collector,
eco,
ecological,
ecology,
ecosystem,
electric,
electrical,
electricity,
environmental,
equipment,
friendly,
fuel,
future,
generator,
glasses,
global,
green,
heat,
innovation,
light,
modern,
panel,
panel,
pattern,
photovoltaic,
pipe,
plant,
power,
protection,
reflective,
renewable,
saving,
station,
summer,
sun,
sunlight,
technology,
thermal,
warming
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