Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Improved method of timber support in mines
Method of supporting roof timbers; device consists of malleable iron plate to be fixed between prop and cross-bar; object is to avoid disadvantages arising from use of wooden prop lids and to minimize risk involved in withdrawing props.
Improved method of timber support in mines
Method of supporting roof timbers; device consists of malleable iron plate to be fixed between prop and cross-bar; object is to avoid disadvantages arising from use of wooden prop lids and to minimize risk involved in withdrawing props.
Improved method of timber support in mines
Iron Coal Trades Rev
Wheatley, J. (Autor:in)
1930
3 Figs.
Aufsatz (Zeitschrift)
Englisch
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