高压保护电路查线机的防载波沙国方魏振武电信部门的装移机和障碍查修，工作人员都是使用查线机作为与机房联络的工具．由于线路紧张，载波电话被普遍使用，因此，工作人员在工作中有时将查线机的搭线误搭在载波线上，造成查线机烧毁．查线机的电路与一般电话机相同，电压... High voltage protection circuit check machine anti-carrier Shagu Fang Weizhen Wu Telecom Department of the loading machine and barrier repair, staff are using the check-line machine as a tool to communicate with the engine room. Due to the tightness of the lines, the carrier phones are commonly used. Therefore, workers sometimes mistakenly take the line of the wire checker on the carrier line at work, causing the wire checker to be destroyed. Check the line machine and the general telephone line the same voltage ...