Zobrazeno 1 - 7
of 7
pro vyhledávání: '"West, Cliff W."'
Publikováno v:
Model Railroad News; Jun2011, Vol. 17 Issue 6, p12-15, 4p
Publikováno v:
Model Railroad News; Jul2016, Vol. 22 Issue 7, p12-14, 3p
Autor:
Casdorph, Dave, Benoit Jr., Rudy, Grantham, Steve, Santos, Bob, West, Cliff W., Ellison, Jack, Maitland, Peter M., Jackson, Matt, Yanos, Greg
Publikováno v:
Model Railroad News; Aug2008, Vol. 14 Issue 8, p12-17, 6p, 1 Color Photograph, 1 Illustration
Publikováno v:
Model Railroad News; Jun2015, Vol. 21 Issue 6, p12-13, 2p
Autor:
Syd S. Peng
Underground coal mining disturbs both the overburden strata and the immediate floor strata. The subject of surface subsidence deals with the issues associated with the movement of overburden strata, which are the layers from the seam to the surface,
