CA340463A - Tunnel forming apparatus - Google Patents

Tunnel forming apparatus

Info

Publication number
CA340463A
CA340463A CA340463A CA340463DA CA340463A CA 340463 A CA340463 A CA 340463A CA 340463 A CA340463 A CA 340463A CA 340463D A CA340463D A CA 340463DA CA 340463 A CA340463 A CA 340463A
Authority
CA
Canada
Prior art keywords
forming apparatus
tunnel forming
tunnel
forming
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
CA340463A
Other languages
French (fr)
Inventor
W. Warner Arthur
P. Ballard Roscoe
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.)
TUNNEL AND MINE MACHINERY Co
Original Assignee
TUNNEL AND MINE MACHINERY Co
Publication date
Application granted granted Critical
Publication of CA340463A publication Critical patent/CA340463A/en
Expired legal-status Critical Current

Links

CA340463A Tunnel forming apparatus Expired CA340463A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA340463T

Publications (1)

Publication Number Publication Date
CA340463A true CA340463A (en) 1934-03-27

Family

ID=35303605

Family Applications (1)

Application Number Title Priority Date Filing Date
CA340463A Expired CA340463A (en) Tunnel forming apparatus

Country Status (1)

Country Link
CA (1) CA340463A (en)

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