CA632060A - Apparatus for and method of constructing tunnels - Google Patents

Apparatus for and method of constructing tunnels

Info

Publication number
CA632060A
CA632060A CA632060A CA632060DA CA632060A CA 632060 A CA632060 A CA 632060A CA 632060 A CA632060 A CA 632060A CA 632060D A CA632060D A CA 632060DA CA 632060 A CA632060 A CA 632060A
Authority
CA
Canada
Prior art keywords
constructing tunnels
tunnels
constructing
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
CA632060A
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 CA632060A publication Critical patent/CA632060A/en
Expired legal-status Critical Current

Links

CA632060A Apparatus for and method of constructing tunnels Expired CA632060A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA632060T

Publications (1)

Publication Number Publication Date
CA632060A true CA632060A (en) 1961-12-05

Family

ID=35888206

Family Applications (1)

Application Number Title Priority Date Filing Date
CA632060A Expired CA632060A (en) Apparatus for and method of constructing tunnels

Country Status (1)

Country Link
CA (1) CA632060A (en)

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