e- vehicle, whichever occasion demands. A spring coup- ture and two field,;coils. The field frame is of cast ling-bar is provided for every wagon, also suitable coup- quires not only shearing but alsoundercutting. When steel and surrounds the field coils and armature, pro- ling arrangements at the… … to the thickness of the vein in which the especially compact machine. The illus- machine is working. tration, Fig. 8, shows a machine whose It is usually found possible to cut from total height is only 18 inches ; its width, 50 feet to 100 feet of entry per day of ten hours, the ex- tecting them…
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