英文關鍵字
assembly
bright
brightness
connection
cutting
dangerous
dazzling
electric
employee
energy
equipment
factory
fastening
flash
glare
industrial
industry
light
making
man
mask
metalworking
one
plant
power
process
production
protective
repairman
several
sparkles
sparks
splash
technology
unit
weld
welder
welding
work
worker
working
workshop