Report of hauling tests at mine in Lens district, of an extreme depth of 500 m.; 3 ton locomotives with ironclad batteries were used; figures show great economy can be effected by using electric locomotives instead of horses or compressed air locomotives.
Experiment in hauling with storage battery locomotives
Essai de traction par locomotives a accumulateurs a la fosse no. 7 des mines de Lens
Revue de l'Industrie Minerale ; n 162
1927
19 pages
Article (Journal)
French
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