FR1054621A - Ventilation ducts - Google Patents

Ventilation ducts

Info

Publication number
FR1054621A
FR1054621A FR1054621DA FR1054621A FR 1054621 A FR1054621 A FR 1054621A FR 1054621D A FR1054621D A FR 1054621DA FR 1054621 A FR1054621 A FR 1054621A
Authority
FR
France
Prior art keywords
ventilation ducts
ducts
ventilation
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
Alfred Schwesig
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 FR1054621A publication Critical patent/FR1054621A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
    • E21F1/04—Air ducts
    • E21F1/06—Duct connections

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)
FR1054621D 1952-02-15 1952-04-18 Ventilation ducts Expired FR1054621A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1054621X 1952-02-15

Publications (1)

Publication Number Publication Date
FR1054621A true FR1054621A (en) 1954-02-11

Family

ID=7717829

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1054621D Expired FR1054621A (en) 1952-02-15 1952-04-18 Ventilation ducts

Country Status (1)

Country Link
FR (1) FR1054621A (en)

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