| 摘要 |
<p>974,816. Mineral-mining equipment. EICKHOFF MASCHINENFABRIK U. EISENGIESSEREI m.b.H. GEB. Dec. 4, 1961 [Dec. 6, 1960], No. 43204/61. Heading E1F. Mining apparatus for lowering the floors of underground mine roadways 4 comprises cutting means 8 mounted on a cutting machine 2 adapted to advance on a rail track 3. The cutting means, preferably an endless cutter chaincarrying loop frame, extends below the track to cut away the ground beneath the track in front of the machine.</p> |
