OTDR在工程上的重大用处是能够方便地找出光纤的断点，并进行故障定位。

In project the important function of OTDR is searching the break point and locating it.

youdao

OTDR在工程上的重大用处是能够方便地找出光纤的断点，并进行故障定位。

In project the important function of OTDR is searching the break point and locating it.

youdao