grou - high
- height-position indicator
- height-range indicator
- heightfinder
- HEL
- HEL mirror
- heli-coil insert
- heliarc torch
- helical
- helical blower
- helical coil
- helical conveyor
- helical curve
- helical dipole
- helical dislocation
- helical drill
- helical flute
- helical gear
- helical gearing
- helical grid
- helical groove
- helical interpolation
- helical launcher
- helical magazine
- helical milling device
- helical motion
- helical mount
- helical plate
- helical polymer
- helical port
- helical postdeflection accelerator
- helical rack
- helical reinforcement
- helical rolling
- helical rotor pump
- helical scan
- helical scanning
- helical screw
- helical screw conveyor
- helical spring
- helical spring primary suspension