英文關鍵字
bright
burner
craftsman
cutter
dangerous
employment
engineer
equipment
factory
fire
flame
flash
gas
glove
glow
hand
hazardous
heat
industry
iron
job
labor
labourer
male
man
manually
manufacturing
melt
metal
metalwork
occupation
oxygen
production
repair
safety
skill
smoke
spark
steel
technical
tool
torch
welding
work
workplace
workshop