機器
PPE
arc
background
boiler
bright
checking
circulation
coded
construction
craftsman
decay
employment
engineer
engineering
equipment
examine
examining
factory
flange
flash
furnace
gloves
heat
heating
helmet
hot
industrial
industry
iron
job
labor
machinery
maintenance
male
man
manual
manufacture
manufacturing
mask
metal
modern
occupation
overalls
people
person
personal
pipe
pipes
pressure
profession
protection
refit
repair
repairing
repairman
rods
rot
rust
safety
skill
skilled
smoke
sparks
steam
steel
system
technical
technology
tool
torch
vessel
visor
weld
welder
welding
work
worker
working
workwear
young