英文關鍵字
aerospace
aircraft
airplane
aviation
check
construction
device
diy
drill
drilling
electric
engine
engineering
equipment
exterior
factory
fuselage
hand
holding
hole
indoor
industrial
industry
instrument
jet
job
machine
maintenance
making
male
man
manufacturing
mechanic
person
plane
plant
power
professional
protection
safety
service
technology
tool
transport
transportation
work
worker