| 1. | A treadwheel crane survives at Guildford, Surrey, United Kingdom.
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| 2. | A treadwheel crane survives at Harwich, Essex, United Kingdom.
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| 3. | The typical harbor crane was a pivoting structure equipped with double treadwheels.
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| 4. | The typical harbour crane was a pivoting structure equipped with double treadwheels.
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| 5. | This submarine was built by August Howaldt and powered by a treadwheel.
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| 6. | The king ordered that his wife be put in a treadwheel crane.
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| 7. | It is the only double wheel treadwheel crane in the United Kingdom.
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| 8. | The crane has two treadwheels of diameter by wide on an axle diameter.
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| 9. | Another son, Smith Griffin, is credited with building a treadwheel in 1810.
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| 10. | The treadwheel dates from the early seventeenth century.
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