FR1338375A
Expired / Lapsed
FR
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Method and device for boring tunnels or galleries in unstable terrain
Assignee: HERSENT
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Filing: 1962-06-28
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Granted: 1963-09-27
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Expires: 1982-06-28
Abstract
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Inventors
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Bibliographic Details
Application Number
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Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-01 19:33
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/06; E21D9/0642; E21D9/065
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