FR716950A - Method and apparatus for the construction of underground tracks - Google Patents

Method and apparatus for the construction of underground tracks

Info

Publication number
FR716950A
FR716950A FR716950DA FR716950A FR 716950 A FR716950 A FR 716950A FR 716950D A FR716950D A FR 716950DA FR 716950 A FR716950 A FR 716950A
Authority
FR
France
Prior art keywords
construction
underground tracks
underground
tracks
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
Guido Janssen
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 FR716950A publication Critical patent/FR716950A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D19/00—Provisional protective covers for working space
    • E21D19/04—Provisional protective covers for working space for use in drifting galleries

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
FR716950D 1930-05-13 1931-05-12 Method and apparatus for the construction of underground tracks Expired FR716950A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE716950X 1930-05-13

Publications (1)

Publication Number Publication Date
FR716950A true FR716950A (en) 1931-12-30

Family

ID=6626564

Family Applications (1)

Application Number Title Priority Date Filing Date
FR716950D Expired FR716950A (en) 1930-05-13 1931-05-12 Method and apparatus for the construction of underground tracks

Country Status (1)

Country Link
FR (1) FR716950A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5155872A (en) * 1990-10-25 1992-10-20 Aymes Doniel G Swimming pool with interlocking wall panels and liner-receiving top rail

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5155872A (en) * 1990-10-25 1992-10-20 Aymes Doniel G Swimming pool with interlocking wall panels and liner-receiving top rail

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