機器
abstract
alloy
background
carbon
cast
casted
casting
corrosion
design
energy
engineering
equipment
factory
forging
frame
fuel
heavy
industrial
industry
iron
macro
manufacturing
metal
metallic
object
oil
old
part
pipe
power
production
retro
ring
rust
steel
storage
storehouse
technology
texture
tube
unmachined
unworked
valve
vintage
warehouse
waste
water
wheel