機器
action
activity
armature
bars
beams
builder
building
casting
cement
concrete pouring
construction site
constructor
contractor
craftsman
crane
development
engineer
engineering
equipment
filling
form
house
industrial
industry
infrastructure
liquid cement
machinery
manual
masonry
material
mortar
occupation
operation
people
phase
pipe
pouring
process
pump
reinforced
reinforcement
steel bars
technology
tube
vibration
wooden frame
work workman
worker