英文關鍵字
adult
business
busy
caucasian
confidence
danger
door
electric
engineering
entrance
equipment
flame
flare
footage
gate
grinder
house
industry
iron
ironwork
ironworker
job
machine
maintain
male
man
manual
metal
metalwork
motion
outdoors
people
person
portable
power
repair
sander
skill
slow
smooth
sparks
spin
standing
steel
steelwork
street
surface
temperature
tool
video
worker