CA436693A - Methode de percer un tunnel - Google Patents

Methode de percer un tunnel

Info

Publication number
CA436693A
CA436693A CA436693A CA436693DA CA436693A CA 436693 A CA436693 A CA 436693A CA 436693 A CA436693 A CA 436693A CA 436693D A CA436693D A CA 436693DA CA 436693 A CA436693 A CA 436693A
Authority
CA
Canada
Prior art keywords
tunnelling method
tunnelling
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
CA436693A
Other languages
English (en)
Inventor
Percival Ayers Frederick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Publication date
Application granted granted Critical
Publication of CA436693A publication Critical patent/CA436693A/fr
Expired legal-status Critical Current

Links

CA436693A Methode de percer un tunnel Expired CA436693A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA436693T

Publications (1)

Publication Number Publication Date
CA436693A true CA436693A (fr) 1946-09-03

Family

ID=35551928

Family Applications (1)

Application Number Title Priority Date Filing Date
CA436693A Expired CA436693A (fr) Methode de percer un tunnel

Country Status (1)

Country Link
CA (1) CA436693A (fr)

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