英文關鍵字
african
angolan
black
boat
computer
control
correct
coverall
earphones
earplugs
earprotection
ecr
electronic
engine
engineer
equipment
headphones
indoor
industry
machine
machinery
male
marine
mariner
maritime
mechanic
mechanism
motor
nigerian
occupation
occupied
one
person
profession
professional
room
safety
serviceman
ship
shipping
technician
uniform
vessel
work
worker
working
workshop