Sorting before finishing, proper mechanical operations during finishing and good selection and match of the finishing chemicals etc. were key points in producing a high quality leather.

通过对涂饰前革坯的挑选，涂饰过程中的机械操作以及涂饰化料的选择与搭配等方面进行合理控制，成革的质量可以显著提高。

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This can cut the time required to process queries by as much as 20 percent because more data can be kept in memory, reducing the number of I/O operations to slower mechanical disk drives.

这导致处理查询所需的时间降低了 20%，因为可以在内存中保存更多数据，减少了对缓慢的机械磁盘驱动器的 I/O 操作次数。

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Typical assignments for mechanical engineers on the program may include manufacturing, safety, operations, maintenance, reliability, and design roles.

典型的机械工程师的职位机会包括：制造、安全、运营、维修、可靠性分析，设计等。

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The Institution of Mechanical Engineers (IMechE) said jobs created by fracking, a form of gas extraction, included chemical, mechanical, civil and structural engineers, operations staff and geologists.

BBC: Fracking could create 'thousands' of engineering jobs

American, which replaced its top operations executive last month, says its aging fleet has led to increased cancellations because of more mechanical breakdowns.

WSJ: The Leader in Lost Bags, Canceled Flights