英文關鍵字
accessory
bright
burner
collar
construction
cut
dangerous
electricity
electrode
equipment
fire
flame
foundry
glasses
glove
glow
grass
hazardous
holder
hot
industrial
industry
install
iron
job
knee
liquid
machinist
manufacturing
metal
metalwork
occupation
outdoor
pipe
production
profession
red
repair
rust
smoke
spark
steel
technology
tools
torch
weld
welder
welding
wires
work