architecture
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blackboard
building
calculator
chalk drawing
chart
choice
computer
concept
construction industry
currency
design
desk
diagram
diy
economy
efficiency
electricity
energy efficiency
energy efficient
energy saving
environmental conservation
environmental issues
finance and economy
group of objects
hammer
home improvement
house
housing project
ideas
keyboard
model house
performance
planning
power
real estate
renovation
residential building
ruler
scale
shape
spend
supply
sustainable lifestyle
sustainable resources
symbol
table
work tool
定額
House Energy Efficiency Rating. Blackboard with chalk drawing, work tools, calculator and a computer keyboard. Project of ecological houseの素材 [FY310137418945]
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