FR978442A - Perforating machine for the extraction of rectangular blocks of rocks or others - Google Patents

Perforating machine for the extraction of rectangular blocks of rocks or others

Info

Publication number
FR978442A
FR978442A FR978442DA FR978442A FR 978442 A FR978442 A FR 978442A FR 978442D A FR978442D A FR 978442DA FR 978442 A FR978442 A FR 978442A
Authority
FR
France
Prior art keywords
rocks
extraction
rectangular blocks
perforating machine
perforating
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
Other languages
French (fr)
Inventor
Marc Paris
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of FR978442A publication Critical patent/FR978442A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
    • E21C25/58—Machines slitting by drilling hole on hole

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
FR978442D 1942-09-04 1942-09-04 Perforating machine for the extraction of rectangular blocks of rocks or others Expired FR978442A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR978442T 1942-09-04

Publications (1)

Publication Number Publication Date
FR978442A true FR978442A (en) 1951-04-13

Family

ID=9520476

Family Applications (1)

Application Number Title Priority Date Filing Date
FR978442D Expired FR978442A (en) 1942-09-04 1942-09-04 Perforating machine for the extraction of rectangular blocks of rocks or others

Country Status (1)

Country Link
FR (1) FR978442A (en)

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