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Mine Face Ventilation Device.

Authors
Divers-EF
Source
U S Patent 1980 Nov; (4)
Link
NIOSHTIC No.
10001423
Abstract
MISSING
Publication Date
19801101
Document Type
PA;
Fiscal Year
1981
NTIS Accession No.
NTIS Price
Issue of Publication
4
NIOSH Division
PRC;
Source Name
U.S. Patent No. 4,235,163, November 25, 1980
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