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Preparation Industrielle des Combustibles SA
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Preparation Industrielle des Combustibles SA
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Publication of FR660430ApublicationCriticalpatent/FR660430A/fr
E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
E21D11/14—Lining predominantly with metal
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FR660430D1927-12-311927-12-31Appareil hydraulique à redresser les cadres de mines
ExpiredFR660430A
(fr)