20863| 47
|
咨询一下,各地现在用的电缆内导体是纯铜的还是铜包钢或铝之类的?? |
re:传输视频信号用纯铜的,传输RF用包钢的。...
| ||
| ||
| ||
手机版|中广网讯(北京)信息技术有限公司 京ICP备16012447号-10
GMT+8, 2024-6-8 03:01 , Processed in 0.063900 second(s), 16 queries , Gzip On.
Powered by Discuz! X3.5
© 2001-2024 Discuz! Team.