英文關鍵字
boat
chemistry
control
cylinder
diesel
dockyard
energy
engine
engineer
equipment
filter
full
gear
heat
indicator
industrial
interior
machine
machinery
manufacturing
marine
mechanic
mechanical
metal
motor
motorized
oil
onboard
pipe
pollution
power
pressure
production
pump
room
safety
shaft
ship
shipping
space
steam
steel
system
technology
transportation
valve
vehicle
vessel
water
worker