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BEIEN MASCHFAB
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Publication of FR1222666ApublicationCriticalpatent/FR1222666A/fr
E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
E21D15/14—Telescopic props
E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
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Mining & Mineral Resources
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Mechanical Engineering
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Structural Engineering
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FR784409A1958-01-251959-01-19Perfectionnements apportés aux dispositifs de soutien hydro-pneumatiques, plus spécialement aux étançons de mines
ExpiredFR1222666A
(fr)