英文關鍵字
action
arc
connect
construction
craftsman
dangerous
des
electric
electrode
engineering
equipment
fire
flash
glove
hot
housing
iron
job
light
making
man
manual
manufacture
manufacturing
mask
metal
metalwork
motion
office
one
public
repair
safety
skill
skilled
smoke
sound
spark
sparkle
steel
technical
technology
tool
utilities
weld
welder
wide
work
worker
workplace