道岔按用途和平面开头分有普通单开道岔、单式对称道岔、三开道岔

搜题请搜索小程序“爱下问搜题”

问题判断题

道岔按用途和平面开头分有普通单开道岔、单式对称道岔、三开道岔、交叉渡线、交分道岔。

答案

参考答案：对

问答题

In relation to the Labour Contract Law of China:

(a) explain the circumstances that make a labour contract invalid or partially invalid in the process of concluding it; (3 marks)

判断题

UM71室内JTC架上可安装可设置2个轨道电路区段的UM71设备。