FR838335A - Improvement provided in the establishment of pruning retaining timber - Google Patents

Improvement provided in the establishment of pruning retaining timber

Info

Publication number
FR838335A
FR838335A FR838335DA FR838335A FR 838335 A FR838335 A FR 838335A FR 838335D A FR838335D A FR 838335DA FR 838335 A FR838335 A FR 838335A
Authority
FR
France
Prior art keywords
pruning
establishment
improvement provided
timber
retaining
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
Louis Cwidak
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 FR838335A publication Critical patent/FR838335A/en
Expired 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
    • E21D15/002—Auxiliary devices in which the prop type is not essential

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)
FR838335D 1938-05-23 1938-05-23 Improvement provided in the establishment of pruning retaining timber Expired FR838335A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR838335T 1938-05-23

Publications (1)

Publication Number Publication Date
FR838335A true FR838335A (en) 1939-03-02

Family

ID=9299006

Family Applications (1)

Application Number Title Priority Date Filing Date
FR838335D Expired FR838335A (en) 1938-05-23 1938-05-23 Improvement provided in the establishment of pruning retaining timber

Country Status (1)

Country Link
FR (1) FR838335A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE760324C (en) * 1941-07-19 1953-01-26 Franz Berghoff Method of excavating struts underground using ropes carried by rammers
DE970192C (en) * 1952-03-26 1958-08-28 Dr Walther Matthiass Method and device for mobile longwall mining

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE760324C (en) * 1941-07-19 1953-01-26 Franz Berghoff Method of excavating struts underground using ropes carried by rammers
DE970192C (en) * 1952-03-26 1958-08-28 Dr Walther Matthiass Method and device for mobile longwall mining

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