aluminum
アルミニウム
acid
acid bath
anodizing
beam
boiler
business
cover
engineering
equipment
etching
factory
galvanic
galvanizing
glossy
grating
gray
heavy metal
industrial
iron
metal
metal construction
metallic
nickel
oxide
pattern
pickling
plant
process
production
protect
remove
rust
silver
steel
surface
tank
vats
warehouse
workshop
zinc