機器
action
activity
architecture
arm
background
bucket
build
builder
business
car
cement
concrete
concreting
construction
contractor
development
equipment
floors
foundation
gravel
high
hose
house
industrial
industry
infrastructure
job
liquid
machinery
metal
mix
mixer
mixing
pipe
pour
pouring
process
project
pump
site
steel
structure
transport
truck
tube
vehicle
wet
work
worker