英文關鍵字
blue
construction
dark
electrode
engineering
equipment
flash
glove
heat
helmet
human
indoor
industrial
industry
iron
laborer
man
manufacture
manufacturing
mask
melting
metal
metalwork
occupation
power
protection
protective
repair
repairer
repairman
safety
skill
slowmo
smoke
sparks
steam
steel
technical
technology
tool
torch
tube
weld
welder
welding
work
worker
workwear