機器
architecture
background
blue
build
building
care
city
construct
construction
contrast
crane
derrick
develop
development
engine
engineering
environment
environmental
equipment
estate
forest
green
growth
high
industrial
industry
iron
leaf
lift
lifting
machinery
modern
nature
park
pollution
powerful
progress
project
sky
skyscraper
structure
sunset
technology
tower
town
tree
urban
work
working