英文關鍵字
adjust
aerospace
aircraft
airplane
auto
aviation
bolt
construction
device
diy
drill
drilling
electric
element
engineering
equipment
factory
fuselage
hand
holding
hole
industrial
industry
instrument
iron
jet
machine
maintenance
making
male
man
manufacturing
mechanic
mechanical
metal
object
plant
power
repair
safety
service
steel
tighten
tool
transportation
twist
work
worker
wrench