英文關鍵字
1080
1920x1080
acetylene
blue
bright
burner
collar
construction
cut
dangerous
definition
equipment
factory
fast
fire
flame
gas
glow
hazardous
hidef
high
hot
industrial
industry
iron
man
manufacturing
metal
metalwork
molten
move
oxygen
production
profession
propane
red
repair
run
rust
slow
spark
steel
tools
torch
weld
work
worker