查看会员资料
用 户 名:jea***
发送消息- Email:用户隐藏
- Icq/MSN:
- 电话号码:
- Homepage:
- 会员简介:
最新会员发布资源
telephone-line-fault-testing
- 电话线出现断线或短路故障时,线路的阻抗则发生很大变化,利用电桥法测试出电阻的大小,进而得出线路故障的地方-Telephone lines appear disconnection or short circuit fault, the line impedance is changed, test out the size of resistance by Wheatstone bridge method, and then draw the line fault place