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효율성

Interior of a taxi depot with parked black taxis and orange cones
@ksk1990

ksk_1990

A person pressing a button on a washing machine
Kayokophotos

Kayokophotos

Woman in business attire ascending an escalator
@kenstock

kenstock

Gray air conditioning unit front with visible vents
mire2024

mire2024

A landscape of solar panels arranged neatly on rooftops of a facility
hiro

hiro

A wind turbine with blades and tower against a clear blue sky
daichichi

daichichi

A white robotic vacuum cleaner moving on a wooden floor
@yskh248

yskh

Two blue halogen bulbs resting on a wooden surface
gorilla1

gorilla1

Reflection of sunlight on solar panel surface
DragonOne

DragonOne

Image of neatly arranged solar panels
@poteton18

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