Abstract: General machinery combination lock password is easy to crack, therefore its security has been a serious threat.

摘要：普通机械密码锁的密码容易被破译，因此其安全性已受到严重的威胁。

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Steady voltage adjustment: Adopt the compensate type combination of machinery and power, the continuous and steady voltage regulating with no sudden break.

电压调节平稳：采用补偿方式机电结合，电压调节连续平稳不会发生突变；

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It utilized the three-dimensional analytical method to studied the optimization process of the the best product combination for food machinery.

运用三维分析法，研究了食品机械产品最佳组合的优化过程。

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"One of the most likely explanations of the so-called 'productivity puzzle' is that companies are either reluctant or unable to make big investments in new plant, machinery and equipment, perhaps due to the uncertain economic outlook or a lack of available finance, or a combination of both, " he said.

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