機器
action
aiming
builder
building
casting
cement
concrete
construction
construction site
constructor
contractor
craftsman
development
directing
equipment
filling
fluid
form
foundation
house
laborer
liquid
man
master
mesh
metal
mortar
operation
pipe
pouring
process
pump
pump tube
pumping
site
steel bars
tube
vibration
vibrator
work
worker
workman
workwear