英文關鍵字
acetylene
bright
burning
color
construction
cutting
danger
electric
equipment
expertise
factory
fire
flame
glasses
glowing
heat
industry
iron
job
light
manual
manufacturing
mask
men
metal
metalwork
natural
occupation
one
parts
person
power
protection
protective
repairing
safety
skill
smoke
sparks
steel
technology
tool
torch
vibrant
welder
welding
welds
work
worker
working
workwear