英文關鍵字
beam
blinding
blue
bluish
bright
cutting
dangerous
dark
darkness
dazzling
electric
energy
factory
fastening
flame
flash
gas
industrial
industry
light
machine
manufacture
mechanical
metal
metalworking
performing
plant
power
process
producing
production
ray
smoke
spark
sparks
splash
stream
technical
technology
weld
welded
welder
welding
work
worker
working