機器
age
aged
builder
building
caucasian
cement
concrete
construction
contractor
domestic
drum
equipment
forties
hard
hat
health
high
home
house
industrial
industry
isolated
job
machinery
male
men
metal
mid
middle
mix
mixer
mixing
motor
occupation
orange
safety
shovel
site
spade
steel
tool
vertical
vest
visibility
wheel
white
worker
working