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Title:
Tunnel liner
United States Patent 1967489
Inventors:
White, Herbert E.
Publication Date:
07/24/1934
Export Citation:
Click for automatic bibliography generation
Assignee:
TRUSCON STEEL CO
Primary Class:
405/153
International Classes:
E21D11/15
;
E21D11/14
View Patent Images:
Download PDF 1967489
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