CA247027A - Methode de minage de la houille - Google Patents

Methode de minage de la houille

Info

Publication number
CA247027A
CA247027A CA247027A CA247027DA CA247027A CA 247027 A CA247027 A CA 247027A CA 247027 A CA247027 A CA 247027A CA 247027D A CA247027D A CA 247027DA CA 247027 A CA247027 A CA 247027A
Authority
CA
Canada
Prior art keywords
coal mining
mining method
coal
mining
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
CA247027A
Other languages
English (en)
Inventor
Drennen Everett
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 CA247027A publication Critical patent/CA247027A/fr
Expired legal-status Critical Current

Links

CA247027A Methode de minage de la houille Expired CA247027A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA247027T

Publications (1)

Publication Number Publication Date
CA247027A true CA247027A (fr) 1925-02-24

Family

ID=35154002

Family Applications (1)

Application Number Title Priority Date Filing Date
CA247027A Expired CA247027A (fr) Methode de minage de la houille

Country Status (1)

Country Link
CA (1) CA247027A (fr)

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