機器
background
blue
bolt
business
chemical
chrome
closeup
concept
connection
construction
design
energy
engineering
equipment
factory
fuel
gas
hardware
heavy
industrial
industry
iron
light
manufacturing
many
mechanic
mechanical
metal
metallic
modern
nut
object
oil
part
petrochemical
petroleum
pipe
pipeline
plant
power
production
refinery
repair
screw
stainless
steel
technology
tool
work