File:Humphrey Pump (Wimperis, 1915).jpg
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![File:Humphrey Pump (Wimperis, 1915).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/a/a7/Humphrey_Pump_%28Wimperis%2C_1915%29.jpg/771px-Humphrey_Pump_%28Wimperis%2C_1915%29.jpg?20130503180132)
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Original file (2,186 × 1,701 pixels, file size: 223 KB, MIME type: image/jpeg)