機器
accuracy
adult
architecture
bars
builder
carpenter
carpentry
cement
closeup
construction
crosssectional
engineering
equipment
hand
high
home
home improvement
indoors
industrial
industry
iron
job
male
man
manual
manufacturing
marking
mature men
measuring
metal
power
protection
residential
rod
safety
site
skyscraper
stack
steel
strength
structure
tensile
timber
tool
wood
work
worker
working
workshop