機器
automobile
background
barrel
big
blue
boiler
bottling
box
business
concrete
container
empty
energy
engineering
equipment
factory
floor
fuel
heavy
indoors
industrial
industry
interior
line
logistic
manufacture
manufacturing
many
metal
modern
natural
package
packaging
pipe
pipeline
plant
power
production
refinery
room
steel
storage
structure
technology
unfinished
vehicle
work
worker
workshop