英文關鍵字
business
construction
conveyor
dilapidated
engineering
equipment
factory
heavy
industrial
industry
iron
line
machine
machinery
manufacture
manufacturing
material
mechanical
metal
metallic
metallurgy
mill
moving
new
object
old
part
plant
power
processing
product
production
railway
raw
roll
rolled
roller
rust
rusty
shaft
stack
steel
technology
turning
warehouse
welding
wheel
wire
work
workshop