機器
bobbin
business
cable
casting
construction
copper
dirty
dust
electric
electricity
engineering
equipment
factory
ferrous
foundry
halls
hardware
heavy
hot
indoors
industrial
industry
inside
iron
large
line
long
manufacturing
material
messy
metal
old
part
pipe
plant
power
processing
production
rusty
spiral
spool
steel
store
supply
technology
wire
work
workshop