(1)测试桩 用途：要用主于阴极保护参数的检测，是管道管理维护中必不可少的装置，按测试功能沿线布设。测试桩可用于管道电位、电流、绝缘性能的测试，也可用于覆盖层检漏及交直流干扰的测试。

Applying: Mainly used in the cathode protection testing of parameters ; an essential device in pipeline management and maintenance; layout along the line by testing functions. Test pile can be used for pipeline potential, current, insulation test

(2)按材质分:钢质测试桩、水泥测