機器
burr holes
column drilling machine
cut
detail
device
diameter
drill
equipment
fabrication
factory
hard
heavy
industrial
industry
iron
large
machinery
machining
make
manufacture
manufacturing
metal
metal work
metalwork
metalworking
old
plant
production
rod
selective focus
sharpness
size
spiral
spiral flutes
steel
technology
tip
tool
twist bit
twist drill
twoflute
upright
upright drill press
vertical
workshop