guid - hear
- half-finished product
- half-hard
- half-hard steel
- half-jog
- half-lap joint
- half-life period
- half-open corner joint
- half-part molding box
- half-pattern
- half-peak breadth of X-ray line
- half-power beam width
- half-tone negative
- half-valve thickness
- half-wave element
- half-wave length
- half-wave rectified magnetizing current
- halide
- halide leak detector
- halite
- Hall detector probe
- Hall flowmeter
- Hall mobility
- hall process
- Hall-effect multiplier
- Hall-Herault process
- halogen acid
- halogen leak detector
- halogen-sensitive leak detector
- halogenide
- halvans
- halving
- hammer
- hammer (swing) mill
- hammer anvil
- hammer block
- hammer blow
- hammer breaker
- hammer cog
- hammer diamond
- hammer forging