機器
assembly
blackout
cable
construction
electricity
electrode
energy
engineering
equipment
factory
fire
flash
gas
glove
heat
helmet
industrial
industry
instrument
inverter
iron
job
laborer
light
man
manufacturing
mask
metal
power
profession
professional
protection
protective
repair
safety
skill
smoke
spark
steel
technical
technology
tool
weld
welder
welding
work
worker
workplace
workshop