Ventilation of manholes.
Effect of vertical ducts in combination with openings in manhole covers on the natural ventilation /
by G.W. Jones, W.E. Miller, and John Campbell.
|Main Author:||Jones, G. W. 1891-|
|Related Names:||Campbell, John , joint author., Miller, W. E. , joint author.|
[Washington, D.C.] : U.S. Dept. of the Interior, Bureau of Mines, 1940.
Manholes > Manholes / Maintenance and repair.
Manholes > Manholes / Design and construction.
7 p. :
ill., charts ;
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