機器
dp
boat
caucasian
command
control
coverall
earphones
ecr
electronic
engine
engineer
equipment
european
generator
headphones
indoor
industry
inspection
machinery
male
marine
mariner
maritime
mechanic
mechanism
motor
nautical
occupation
one
people
person
pipe
plugs
profession
professional
propulsion
room
safety
serviceman
ship
shipping
start
stop
technician
uniform
vessel
worker
working