catenary installation car

例句：

1. 1. The catenarycable is used to transmit power over longdistances.
   复线电缆用于远距离传输电力。
2. 2.The construction of the catenary towerwas a major challenge for the engineers.
   建造复线塔对工程师来说是一大挑战。
3. 3.The catenary effect is responsible forthe curvature of the Earth's magnetic field.
   复线效应是地球磁场弯曲的原因。