| 摘要 |
27 A trolley-type power supply means and a turntable switch (8) for moving apparatuses such as mining equipment. The switch (8) is provided with two coupling portions (11, 12) installed in parallel with each other and reversely symmetrically with respect to a turning axis (9). By means of the coupling portions (11, 12) a trolley can be turned in a desired direction or shunted from the trolley track (5) to allow another trolley to pass by. (Fig. 6)
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