英文關鍵字
aircraft
assembly
blade
bright
dazzling
electric
engine
equipment
industrial
industry
light
man
manufacture
material
mechanism
metal
metalworking
motor
parts
plant
power
process
product
production
professional
repair
repairman
sparkles
sparks
steel
technology
unit
weld
welder
welding
work
worker
working
workman
workshop