英文關鍵字
abrasive
bars
blacksmith
blade
blades
building
business
construction
cut
cutting
detail
disc
electric
engineering
equipment
fix
flash
for
hand
heavy
hold
industrial
industry
instrument
iron
job
lathes
light
machine
man
manual
manufacturing
metal
outdoor
part
pieces
power
production
professional
safety
saw
sharp
spark
specialist
standing
steel
technical
technology
tool
using
welding
wheel
work
worker