English to Spanish Tech/Engineering Engineering (general) Reclamaciones, demandas

Se trata de unos elementos muy pesados que son transportados, parte del texto original, más abajo pongo un enlace de un video:

It was an impressive moment when the bullets were moved within the port. Each of the four items was up to 80 m long but they had different weights: two bullets with a weight of 350t each were loaded on a configuration of 12+12 axle lines in side-by-side configuration. The two other bullets of 460t each were loaded on 28 axle lines in an open-compound configuration with bolsters, which was composed of a front convoy in a 6+6 axle side-by-side combination and a rear convoy in 8+8 axle side-by-side configuration.

Please see video of an even bigger bullet: https://www.youtube.com/watch?v=LblQSMihix0

Alguien sabe qué es y cómo se llama en español?
Muchas gracias por la ayuda