Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Test of treated timbers in mine at Negaunee, Mich
Test to obtain information on absorption by and penetration into mine timbers, of zinc chloride, borax, and sodium fluoride by hot and cold bath process; effectiveness of three chemicals in extending life of mine timbers; and to compare average useful life of treated timbers and untreated timbers; service test of maple timbers installed in main haulageways of Athens mine.
Test of treated timbers in mine at Negaunee, Mich
Test to obtain information on absorption by and penetration into mine timbers, of zinc chloride, borax, and sodium fluoride by hot and cold bath process; effectiveness of three chemicals in extending life of mine timbers; and to compare average useful life of treated timbers and untreated timbers; service test of maple timbers installed in main haulageways of Athens mine.
Test of treated timbers in mine at Negaunee, Mich
U S Bur Mines -- Report Investigations
Crawford, F.S. (Autor:in) / Wirka, R.M. (Autor:in)
1950
6 pages
Supp plates
Report
Englisch
© Metadata Copyright Elsevier B. V. All rights reserved.
Central mine rescue station, Cleveland-Cliffs Iron Co. mather mine B shaft, Negaunee, Mich
| Engineering Index Backfile | 1954
The negaunee district underground properties
| Engineering Index Backfile | 1929
| Engineering Index Backfile | 1933
| Engineering Index Backfile | 1920
Progress in treating mine timbers
Engineering Index Backfile | 1929