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| Q. |
Plug rolling is used to |
| A. | Reduce the wall thickness and increase the diameter of tubes already made |
| B. | Remove out of roundness of pipes |
| C. | Increase the wall thickness of pipes at ends |
| D. | Reduce the diameter of pipe |
| E. | Cut threads at the ends of pipes |
| Answer» A. Reduce the wall thickness and increase the diameter of tubes already made | |
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