機器
automated
background
black
boring
build
business
closeup
construction
cooling
cut
cutter
cutting
detail
drill
drilling
engineering
enterprise
equipment
factory
hard
heavy
hole
industrial
industry
iron
lathe
machining
macro
manufacturing
metal
metallic
metalwork
perforate
plant
power
press
production
shiny
silver
single
stainless
steel
strength
technology
tool
turning
work
worker
workshop