| 摘要 |
a. Vibrating device, especially a vibrating table for precasting concrete products. b. Device for a vibrating table 1 whose vibration is performed by an eccentric mass 6 solidly attached to the shaft 4 and a free eccentric mass 7, driven by a main motor 8 and by an auxiliary motor 9 which is started by the control means 13 before starting the main motor 8. c. The invention is particularly applicable to vibrating tables for machines for precasting concrete products. <IMAGE>
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