hier - hori
- hollow arbor
- hollow axle
- hollow bar
- hollow bore spindle
- hollow bored shaft
- hollow cable
- hollow casting
- hollow center
- hollow chamfer
- hollow circular saw
- hollow conductor
- hollow core
- hollow drill steel
- hollow drilling tube
- hollow ground circular saw
- hollow ground scraper
- hollow insulator
- hollow journal
- hollow key
- hollow mandrel
- hollow mandrel lathe
- hollow mill
- hollow milling
- hollow parts cold header
- hollow pivot
- hollow rivet
- hollow roll
- hollow rope
- hollow shaft
- hollow shaft speed reducer
- hollow spindle
- hollow spoke
- hollow-centered
- hollow-edged file
- hollow-shank holder
- hollow-shank spindle
- hollow-shank toolholder
- hollow-taper-shank toolholder
- hologram
- hologram rendition
