CA620793A - Tunnel construction - Google Patents

Tunnel construction

Info

Publication number
CA620793A
CA620793A CA620793A CA620793DA CA620793A CA 620793 A CA620793 A CA 620793A CA 620793 A CA620793 A CA 620793A CA 620793D A CA620793D A CA 620793DA CA 620793 A CA620793 A CA 620793A
Authority
CA
Canada
Prior art keywords
tunnel construction
tunnel
construction
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
CA620793A
Inventor
P. Washabaugh Edward
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.)
American Marietta Co
Original Assignee
American Marietta Co
Publication date
Application granted granted Critical
Publication of CA620793A publication Critical patent/CA620793A/en
Expired legal-status Critical Current

Links

CA620793A Tunnel construction Expired CA620793A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA620793T

Publications (1)

Publication Number Publication Date
CA620793A true CA620793A (en) 1961-05-23

Family

ID=35875985

Family Applications (1)

Application Number Title Priority Date Filing Date
CA620793A Expired CA620793A (en) Tunnel construction

Country Status (1)

Country Link
CA (1) CA620793A (en)

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