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This category has the following 18 subcategories, out of 18 total.
- ► Ashworth and Parker engines (2 F)
- ► Easton & Amos engines (1 C)
- ► Gimson engines (1 C, 11 F)
- ► Porter-Allen steam engines (4 F)
- ► Tangye steam engines (9 F)
- ► Willans steam engines (14 F)