CA634983A - Tunnel construction - Google Patents

Tunnel construction

Info

Publication number
CA634983A
CA634983A CA634983A CA634983DA CA634983A CA 634983 A CA634983 A CA 634983A CA 634983 A CA634983 A CA 634983A CA 634983D A CA634983D A CA 634983DA CA 634983 A CA634983 A CA 634983A
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
CA634983A
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 CA634983A publication Critical patent/CA634983A/en
Expired legal-status Critical Current

Links

CA634983A Tunnel construction Expired CA634983A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA634983T

Publications (1)

Publication Number Publication Date
CA634983A true CA634983A (en) 1962-01-23

Family

ID=35891165

Family Applications (1)

Application Number Title Priority Date Filing Date
CA634983A Expired CA634983A (en) Tunnel construction

Country Status (1)

Country Link
CA (1) CA634983A (en)

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