* Question
| At present, what kinds of fibers are commonly produced in China? |
* Answer
| At present, optical fibers produced in China are commonly used in step-type and gradient-type multimode fibers and single-mode fibers. |
* Question
| At present, what kinds of fibers are commonly produced in China? |
* Answer
| At present, optical fibers produced in China are commonly used in step-type and gradient-type multimode fibers and single-mode fibers. |

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