Yazar
h b brunot
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Cilt sonuçları
Permissible mine equipment approved during the calendar years 1947-49
H. B. Brunot · U.S. Dept. of the Interior, Bureau of Mines
16 sayfa · 1950
Standards / Mining machinery / Coal-mining machinery
Permissible mine equipment approved during the calendar year 1950
H. B. Brunot · U.S. Dept. of the Interior, Bureau of Mines
Sayfa sayısı yok · 1951
Standards / Mining machinery / Coal-mining machinery