AT197852B - Closed protective hood for the construction of galleries and tunnels - Google Patents

Closed protective hood for the construction of galleries and tunnels

Info

Publication number
AT197852B
AT197852B AT197852DA AT197852B AT 197852 B AT197852 B AT 197852B AT 197852D A AT197852D A AT 197852DA AT 197852 B AT197852 B AT 197852B
Authority
AT
Austria
Prior art keywords
galleries
tunnels
construction
protective hood
closed protective
Prior art date
Application number
Other languages
German (de)
Inventor
Heinrich Walbroehl
Original Assignee
Heinrich Walbroehl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heinrich Walbroehl filed Critical Heinrich Walbroehl
Application granted granted Critical
Publication of AT197852B publication Critical patent/AT197852B/en

Links

AT197852D 1956-04-30 1956-04-30 Closed protective hood for the construction of galleries and tunnels AT197852B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT197852T 1956-04-30

Publications (1)

Publication Number Publication Date
AT197852B true AT197852B (en) 1958-05-27

Family

ID=3667916

Family Applications (1)

Application Number Title Priority Date Filing Date
AT197852D AT197852B (en) 1956-04-30 1956-04-30 Closed protective hood for the construction of galleries and tunnels

Country Status (1)

Country Link
AT (1) AT197852B (en)

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