英文關鍵字
carrier
changing
close
combustion
controls
crude
cylinders
diesel
engine
engineer
equipment
exhaust
fuel
heavy
industrial
industry
large
levers
manual
maritime
mechanical
monitoring
motor
nautical
open
paint
panel
power
pressure
pump
safety
sea
ship
spin
steam
technician
technology
tight
tool
turn
vents
vessel
wheel
work