機器
concrete vibration
action
activity
armature
builder
building
casting
cement
civil construction
concrete
concrete pump
construction site
constructor
contractor
crane
development
engineer
engineering
equipment
foundation
house
industrial
industry
infrastructure
laborer
machinery
man at work
masonry
material
metal
mortar
occupation
operation
people
pipe
pouring
pouring cement
process
pump
reinforced steel bars
reinforcement
rods
slab
teamwork
technology
vibrator
work
worker
workman
workwear