機器
accuracy
arc
assembly
concentration
connect
craft
engineering
expertise
factory
fire
fix
flame
flash
glove
handbook
helmet
horizontal
illuminated
indoor
industrial
iron
job
join
making
manufacturing
mask
mechanic
occupation
person
power
production
protection
repair
safety
skill
smoke
spark
standing
steel
technical
torch
trained
welder
work
worker
working
workplace
workshop