DE253702C - - Google Patents

Info

Publication number
DE253702C
DE253702C DENDAT253702D DE253702DA DE253702C DE 253702 C DE253702 C DE 253702C DE NDAT253702 D DENDAT253702 D DE NDAT253702D DE 253702D A DE253702D A DE 253702DA DE 253702 C DE253702 C DE 253702C
Authority
DE
Germany
Prior art keywords
rod
angle lever
push
machines
pull rod
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.)
Active
Application number
DENDAT253702D
Other languages
German (de)
English (en)
Publication of DE253702C publication Critical patent/DE253702C/de
Active legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/10—Making by using boring or cutting machines

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Drilling And Boring (AREA)
DENDAT253702D Active DE253702C (enrdf_load_stackoverflow)

Publications (1)

Publication Number Publication Date
DE253702C true DE253702C (enrdf_load_stackoverflow)

Family

ID=511963

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT253702D Active DE253702C (enrdf_load_stackoverflow)

Country Status (1)

Country Link
DE (1) DE253702C (enrdf_load_stackoverflow)

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