英文關鍵字
beam
blow
blowtorch
bright
career
construction
craftsman
cut
cutting
employee
equipment
factory
fire
flame
flash
fusing
handwork
heat
holding
hot
industrial
industry
iron
job
labor
laborer
laboring
light
machinery
man
manual
manufacture
manufacturing
melt
metal
molten
occupation
people
person
practical
professional
skill
smoke
spark
steel
tool
using
work
worker
working
workplace