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在学习无产阶级专政理论运动的推动下,北京市第一建筑构件厂根据行星滚道振动原理,在抽芯管中设计、安装了一组行星式高频振子,经过反复试验,克服了商频振子在水平定位条件下不易起振的难题,获得了振动频率每分钟12,000次,激振力达1,000公
In the study of the theory of proletarian dictatorship movement, the first building components factory in Beijing according to the principle of planetary roller vibration in the draw tube design and installation of a set of planetary high frequency oscillator, after repeated tests to overcome the commercial frequency Oscillator difficult to start in the horizontal position of the problem, the vibration frequency of 12,000 times per minute, the excitation force of 1,000 public