For instance, improvement in mechanical efficiency is very slow.

比如说, 机械效率的提高是非常缓慢的.

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And mechanical efficiency's change can also reflect the running state of machine.

同时,机械效率的变化也为故障诊断提供依据.

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If efficiency can point to efficiency of mechanical efficiency, work efficiency, economy, wait a moment.

如效率可以指机械效率 、 工作效率 、 经济效率等等.

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We ask for full payment at sight because we can guarantee 90 % mechanical efficiency.

我们要求全额即期支付是因为我们能保证90%的机械效率.

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With lightweight, durable, high mechanical efficiency, safe, reliable, flexible performance characteristics of the operation.

具有轻便 、 耐用 、 机械效率高 、 安全可靠 、 操作灵活等性能特点.

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