機器
acetylene
arc
bomb
bottle
chemical
compress
compressed
construction
container
cylinder
equipment
factory
fire
flame
gas
glasses
helmet
hot
industrial
industry
iron
job
liquid
machinery
manufacturing
mask
metal
meter
nobody
oxygen
pipe
pressure
production
propane
repair
safety
steel
storage
tank
tool
tools
valve
weld
welder
welding
work
worker