on-l - opti
- on-line component
- on-line detection
- on-line inspection
- on-line maintenance
- on-line mode
- on-line operation
- on-line repair
- on-line self-diagnosis
- on-line test
- on-line [operating, operational, operative] state
- on-line [operating] diagnosis
- on-load period
- on-location test
- on-off
- on-off (use) cycle
- on-off cycling
- on-off function
- on-off rating
- on-off ratio
- on-orbit maintenance
- on-order card
- on-order material
- on-paper test
- on-position
- on-receipt inspection
- on-site
- on-site examination
- on-site fabrication
- on-site maintenance
- on-site test
- on-site trials
- on-site [on-the-spot] inspection
- on-the-job accident
- on-the-job safety
- on-the-job training
- on-the-shelf
- on-the-shelf availability
- on-the-shelf component
- on-the-shelf item
- on-the-shelf parts
