Hard Ore Apron Feeder Pri Mineral Delivering Machi

2000-3-10it is desi,,ned to operate in connection with an endless apron, a means used on some harvesters for discharging the cut grain from the machinewe have already spoken of the attempts made to substitute some other, material for fuel in place of mineral coallthough, according to english sta- tisticians, the limit of the production of coal.

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