金属産業
aluminum
アルミニウム
chrome
circle
construction
cylinder
cylindrical
dirty
equipment
factory
fuel
heating
hydraulic
in a row
industry
iron
machine part
machining
manufacture
manufacturing
material
metal
metallic
metalwork
motor
natural gas
nobody
occupation
oil industry
pipe
pipeline
piston
repairing
repetition
roller
rusty
shelf
shiny
silver
square shape
stack
stainless steel
steel
storage room
technology
toothed
warehouse
water pipe
work
work tool