英文關鍵字
background
burr
carbide
ceramic
chisel
concrete
conduct
construction
crown
cutter
cutting
diameter
diamond
drill
drilling
equipment
focus
hang
hole
industrial
industry
instrument
machine
many
metal
model
new
part
reinforcedconcrete
rock
round
science
set
sharp
solid
steel
technology
tile
tool
tube
white
work