skos:altLabel | - Allan
- Stephenson
- Stephenson's
- new form
- Allan Straight Link
- Allan straight link
- Allan straight link valve gear
- Allan valve gear
- Gooch valve
- Stephenson Link
- Stephenson Link valve gear
- Stephenson design
- Stephenson link
- Stephenson link gear
- Stephenson link motion
- Stephenson link valve gear
- Stephenson link-motion
- Stephenson motion
- Stephenson pattern
- Stephenson type
- Stephenson valve gear#Allan gear
- Stephenson's link motion
- Stephenson's valve gear
- Stephenson-link motion
- Stephenson_valve_gear#Gooch_valve_gear
- Stephenson’s Link
- Stephenson valve gear#Allan straight link valve gear
- outside Stephenson valve gear
- reversing lever
- variable timing valve
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