英文關鍵字
action
aircraft
airport
bag
baggage
beard
belt
bolts
cables
clamp
coat
controlling
conveyor
ear
engineer
equipment
fingers
flashlight
hand
hard
hat
helmet
industrial
knob
luggage
machine
machinery
male
motors
nuts
plane
plugs
service
sorter
steel
suitcase
switching
system
technology
tightening
tools
torch
travel
turning
under
way
wires
wrench