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| Q. |
Ball bearing type screws |
| A. | Sliding friction is replaced by rolling friction |
| B. | There is a ball bearing provided on the screwed shafts |
| C. | Are self-locking |
| D. | Friction is more |
| E. | Have load bearing capacity for more than vee threads |
| Answer» A. Sliding friction is replaced by rolling friction | |
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