hot- - impa
- hydraulic soundness
- hydraulic sprays
- hydraulic stripper
- hydraulic test
- hydraulic thruster arm
- hydraulic tilter
- hydraulic wedge
- hydraulic-mechanical press brake
- hydraulically balanced spindle
- hydride
- hydride phase
- hydride powder
- hydroblasting
- hydrobowl
- hydrocarbon
- hydrocarbon black
- hydrocarbon fuel
- hydrocarbon gas
- hydrocarbon injection
- hydrocarbonaceous
- hydrocarbonate
- hydrocarbonate of magnesia
- hydrocarbonate of zinc
- hydrochloric
- hydroclassifier
- hydrocyclone
- hydrodynamic film
- hydrodynamic machining
- hydroextractor
- hydrofilter
- hydroforming
- hydrogen annealing
- hydrogen attack
- hydrogen blister
- hydrogen blistering
- hydrogen brazing
- hydrogen brazing furnace
- hydrogen charging
- hydrogen cracking
- hydrogen cutting