3d
alternative
architecture
background
blueprint
boiler
building
business
cad
certificate
chart
class
classification
collector
color
concept
construction
design
draft
drawing
eco
ecology
efficiency
efficient
electric
energy
engineer
environment
green
heater
heating
house
illustration
industry
office
panel
plan
project
ranking
rating
renewable
solar
source
sustainable
system
tech
technical
technology
water
定額
Solar water heating system and energy efficiency chart on project blueprint background. Renewable energy design and construction concept. 3d illustrationの素材 [FY310162797274]
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