英文關鍵字
action
activity
and
big
blade
build
builder
cement
circular
concrete
construction
cut
cutter
danger
diamond
dirty
disc
disk
dust
dusty
environment
equipment
floor
grinder
industrial
industry
job
joint
joints
laborer
large
lots
machine
man
metal
moisture
noise
pavement
person
power
reconstruction
round
safety
saw
sawing
site
skill
slab
straight
technology
the
tool
using
wet
wheel
with
work
worker
workplace