Under the Wires

เนื้อหาเบื้องต้น

The electrification of the London Midland Region main line between London, Manchester and Liverpool at 25KV AC, using overhead wires and drawing supply from the National Grid, was a major undertaking involving civil, electrical, mechanical and signal engineering of a complex and advanced nature. This film depicts some aspects of the problems involved and of the unprecedented operations which were carried out.