heav - hydr
- heavy air
- heavy crude
- heavy cycle oil
- heavy duty
- heavy duty truck
- heavy fraction
- heavy still bottom
- heavy vacuum gas oil
- helical gear drive
- high boiling fraction
- high capacity
- high frequency reciprocating rig
- high grade fuel
- high line gas
- high octane rating
- high pressure fuel pump
- high-temperature lacquer
- high-temperature varnish
