- runner exit
- runner eye diameter
- runner housing
- runner hub
- runner hub assembly
- runner inlet
- runner inner lid
- runner level
- runner opening
- runner outline
- runner plate
- runner removal access
- runner sealing ring
- runner series
- runner servomotor
- runner shroud
- runner skirt
- runner tip
- runner type
- runner vane
- runner vane opening
- runner wall ring
- runner with stainless steel blades
- runner with various metals
- running balance
- running clearance
- running load
- running repair
- running spares
- running speed
- runoff
- runout of shaft
- runway localizer
- rupture
- rural distribution wire
- rural subscriber
- rural wired broadcast network
- rust
- rust proof oil
- rustless steel runner
- rz baseband signaling
- s shaped blade
- saddle coil
- safe
- safe allowable stress
- safe carrying capacity
- safe conduct
- safe current
- safe load
- safe range