FR767881A - - Google Patents

Info

Publication number
FR767881A
FR767881A FR767881DA FR767881A FR 767881 A FR767881 A FR 767881A FR 767881D A FR767881D A FR 767881DA FR 767881 A FR767881 A FR 767881A
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 FR767881A publication Critical patent/FR767881A/fr
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/86—Cores
    • B28B21/88—Cores adjustable, collapsible or expansible

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
FR767881D Expired FR767881A (zh)

Publications (1)

Publication Number Publication Date
FR767881A true FR767881A (zh) 1934-07-25

Family

ID=1551802

Family Applications (1)

Application Number Title Priority Date Filing Date
FR767881D Expired FR767881A (zh)

Country Status (1)

Country Link
FR (1) FR767881A (zh)

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