英文關鍵字
african
angolan
black
boat
caucasian
control
coverall
earphones
ecr
electronic
engine
engineer
equipment
generator
indoor
industry
inspection
machine
machinery
male
marine
mariner
maritime
mechanic
mechanism
metal
motor
nautical
nigerian
occupation
pipe
plugs
profession
professional
propulsion
room
safety
serviceman
ship
shipping
start
stop
technician
uniform
vessel
worker
working