retreating longwall method in the direction of the strike with filling
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First Online:
DOI: https://doi.org/10.1007/978-3-642-41714-6_181962
retreating longwall method in the direction of the strike with filling ● streichender Rück(wärts)strebbau m mit Versatz, streichender Strebrück(wärts)bau mit Versatz
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© Springer-Verlag Berlin Heidelberg 2014