one- - over
- open-back inclinable press
- open-back press
- open-bottom mold
- open-coil annealing plant
- open-die coining
- open-die explosive forming technique
- open-die forging.
- open-die process
- open-die technique
- open-end mold
- open-ended forging
- open-ended mold
- open-ended workpiece
- open-flame furnace
- open-gap upset welding
- open-gate knob
- open-grained cast iron
- open-grid track
- open-hearth fuel
- open-hearth furnace
- open-hearth operation
- open-hearth pig iron
- open-hearth plant
- open-hearth practice
- open-hearth process
- open-hearth refining
- open-hearth rolling furnace
- open-hearth roof
- open-hearth roof temperature
- open-hearth scrap
- open-hearth sinter
- open-hearth slag
- open-hearth steel
- open-hearth tilting furnace
- open-pit mining
- open-poured steel
- open-top furnace
- open-topped housing
- open-type ladle
- opened coil