Assertion: fiber optic cable's fiber | /r/ObjectUse | used for long time
Facets:
value: under various playing conditions
type: OTHER
value: in a variety of environments
type: LOCATION
Source sentences:
text: In the actual optical fiber communication line, in order to ensure that optical fiber can be used for a long time under various playing conditions and in a variety of environments, it must be formed to optical fiber cable, because optical Fiber must be covered by several layers of protective structure before use, the cable that is covered is called optical fiber cable.