Old pinball machines are amazingly complex
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一次命中怎样加五千分?分数电机转动凸轮,让触点依次闭合,千分继电器收到五个脉冲。慢慢用手转动电机,就能逐步核对这次加分。
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It allows things to happen automatically in a sequence.the 1,000 point relay will receive five pulses