機器
architecture
background
blue
brick
build
builder
building
business
cart
cement
concrete
construction
development
dirty
electric
environment
environmental
equipment
factory
grass
gravel
heavy
house
individual
industrial
industry
machinery
manufacturing
material
metal
mix
mixer
mixing
mobile
motor
orange
plant
private
produce
production
professional
sand
site
technology
tool
trowel
wheel
white
work