| 11. | A threaded pipe has a screw thread at one or both ends for assembly.
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| 12. | Both of these cameras used M42 screw thread lenses as did the Pentax Spotmatic.
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| 13. | The "'M39 "'lens mount is a screw thread mounting system for attaching lenses to Leicas.
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| 14. | Additional screw thread sizes are available for other uses.
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| 15. | Instead of gear teeth, the context is screw threads.
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| 16. | Each bimetallic strip terminated with a screw thread mounted with a weight or balance nut.
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| 17. | History, like a screw thread, winds around and around.
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| 18. | They are made of either soft plastic or metal that expands while gripping screw threads.
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| 19. | This allowed screw threads to be precisely cut.
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| 20. | A : Try applying a penetrating oil around the screw threads to help free it up.
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