機器
air
aircraft
airforce
aviation
base
big
build
cabin
check
checkup
civil
complicated
components
copter
disassemble
engineering
equipment
factory
fix
flight
force
fuselage
hangar
helicopter
industrial
industry
installation
maintenance
manufacture
manufacturing
metal
mi8
military
modern
modernization
new
nobody
plant
preparation
production
service
technology
transport
transportation
vehicle
work
workshop