英文關鍵字
arm
blade
blue
board
boilersuit
circle
circular
closeup
construction
cover
cut
cutoff
dangerous
dust
electric
equipment
gray
guide
hand
hardware
hold
industrial
keep
machine
man
manual
mechanical
metal
move
one
operation
overall
plank
plate
plastic
rotary
round
saw
scobs
serrated
sharp
steel
submersible
technics
tool
use
work
yellow