機器
action
activity
builder
cement
concrete
construction
construction equipment
construction industry
construction site
construction worker
constructor
contractor
craftsman
engineer
equipment
foreman
hardhat
helmet
industrial
industrial equipment
industry
infrastructure
labor
loading
maintenance
making
male
man
manual worker
material
mix
mixed
mixer
occupation
outdoors
people
preparation
repair
sand
shovel
site
structure
uniform
using
work
worker
working
workwear