機器
燃やす
ballast
car
casting
construction
de stress
engineering
exothermic
fire
flame
heat
hot
industrial
industry
iron
liquid
maintenance
melting
metal
orange
oxidation
oxide
pot
rail
railroad
railway
reaction
red
repair
road
site
sleeper
smoke
steel
technology
thermit
thermite
torch
travel
vehicle
way
weld
welded
welder
welding
work