n.有軌電車；礦車

The new Chinese first tramcar is born in Changchun. 新中國第一輛有軌電車在長春誕生。

If the tramcar runs over speed, then an alarm is given. 若礦車超速，則有報(bào)警信號(hào)發(fā)出。

Meanwhile, the suitable conductors and detectors were chosen according to the result of tramcar locating analysis. 根據(jù)礦車對(duì)位的分析結(jié)果，配置了相應(yīng)的傳感器和檢測(cè)裝置。