Method of making an elongated hollow concrete body
United States Patent 3249664

Inventors:
Christer, Georgii Hans
Publication Date:
05/03/1966
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Assignee:
Christer, Georgii Hans
Primary Class:
Other Classes:
264/573, 264/165, 264/32, 405/222, 405/223, 264/35, 264/34, 114/65A
International Classes:
E02D23/02; E02D29/09; E02D23/00; E02D29/00
Foreign References:
FR694259A