英文關鍵字
basement
black
boiler
burn
burning
cap
chimney
coal
construction
conveyor
dark
digging
employee
energy
equipment
fire
fireman
fireplace
firewood
flame
fuel
furnace
gloves
heat
heater
heavy
isolated
machine
man
modern
occupations
poker
powerful
production
rake
removes
resistant
room
smoke
steam
stokehole
stoker
stove
system
tank
technology
ventilation
work