在工程建设中，尤其是高速公路或者铁路上，由于机动车的来回穿行，为了安全起见，不能够架设电线杆，所以就得使用电缆槽模具这种地下导电设施，在道路两边挖40厘米的深沟，然后将预制好的混凝土电缆槽放进去，最后再将电线放进去就可以了。这种电缆槽模具预制件使用起来既方便而且造价低，符合我国发展的国情。

In the engineering construction, especially the highway or railway, because the vehicle back and forth through, for the sake of safety, not to set up the pole, so we have to use the cable slot die of the underground conductive facilities, dug trenches 40 cm on both sides of the road, then the prefabricated concrete cable groove is put in, then the wire put on it. This kind of cable groove preform is easy to use and is low in cost. It is in line with the national conditions of our country.