FR1037121A - - Google Patents

Info

Publication number
FR1037121A
FR1037121A FR1037121DA FR1037121A FR 1037121 A FR1037121 A FR 1037121A FR 1037121D A FR1037121D A FR 1037121DA FR 1037121 A FR1037121 A FR 1037121A
Authority
FR
France
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)
Publication date
Application granted granted Critical
Publication of FR1037121A publication Critical patent/FR1037121A/fr
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
    • E21D15/14—Telescopic props
    • E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/32—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring
    • E21D15/325—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring by a clamping ring

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)
FR1037121D Expired FR1037121A (zh)

Publications (1)

Publication Number Publication Date
FR1037121A true FR1037121A (zh) 1953-09-15

Family

ID=1567508

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1037121D Expired FR1037121A (zh)

Country Status (1)

Country Link
FR (1) FR1037121A (zh)

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