DE289903C - - Google Patents

Info

Publication number
DE289903C
DE289903C DENDAT289903D DE289903DA DE289903C DE 289903 C DE289903 C DE 289903C DE NDAT289903 D DENDAT289903 D DE NDAT289903D DE 289903D A DE289903D A DE 289903DA DE 289903 C DE289903 C DE 289903C
Authority
DE
Germany
Prior art keywords
punch
stamp
wooden
bore
weakening
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
DENDAT289903D
Other languages
German (de)
English (en)
Publication of DE289903C publication Critical patent/DE289903C/de
Active legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/02—Non-telescopic props

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Drilling Tools (AREA)
DENDAT289903D Active DE289903C (OSRAM)

Publications (1)

Publication Number Publication Date
DE289903C true DE289903C (OSRAM)

Family

ID=544900

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT289903D Active DE289903C (OSRAM)

Country Status (1)

Country Link
DE (1) DE289903C (OSRAM)

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