英文關鍵字
abrade
background
bead
built
close
construct
construction
danger
deatil
detail
equipment
factory
flame
goggles
grind
grinder
grinds
heat
hone
industrial
industry
job
light
line
man
manual
manufacturing
metal
metallurgy
metalwork
occupation
part
plant
production
repair
safety
spark
steel
tool
torch
weld
welder
welding
work
worker
workplace
workshop