接触网故障探测 装置 contact fault locator: 接触式故障定位器line fault locator: 线路故障定位器catenary overhead contact line: 链线架空接触线inclined overhead contact line: 斜链形悬挂的架空接触线overhead contact line: 架空接触线下载手机词典可随时随地查词查翻译