英文關鍵字
activity
alloy
aluminum
anvil
bar
blacksmith
bladesmith
chainsaw
circular
clip
craft
cutting
employee
eyeglasses
factory
fire
flame
footage
foundry
furnace
hammer
heat
hitting
hot
industrial
industry
iron
machine
manufacturing
metal
metallurgy
motion
rebar
safety
shot
skill
slow
sparks
steel
tool
vdo
video
welder
worker