hard - high
- hard (face) weld
- hard (face) weld
- hard abrasive wear
- hard alkylbenzene
- hard automated system
- hard automation
- hard axis
- hard banding
- hard bearing balancing machine
- hard chrome plating
- hard coal
- hard coal equivalent
- hard coat
- hard copy
- hard copy device
- hard copy map
- hard core
- hard core diamonds
- hard criteria
- hard data
- hard data loss
- hard decision
- hard energy technology
- hard eraser
- hard error
- hard flutter point
- hard geometric facts
- hard glassy product
- hard goods
- hard grease
- hard ground shield unit
- hard hat
- hard image
- hard ion
- hard keying
- hard limiter
- hard loading
- hard loading system
- hard lubricant
- hard magnetization axis
