Pre-control means the control of the project preparation stage, mid-control is the control of the construction process, after control means after the end of the project quality control.

事前控制是指对工程准备阶段的控制，事中控制是指对工程施工过程的控制，事后控制是指工程结束后质量的控制。

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This paper introduce the many kinds of thread joint pre-tightening up force control method and against loose measure, elaborates the solution thread joint quality method.

文章介绍了多种螺纹联接的预紧力控制方法和防松措施，从多方面针对性的阐述了解决螺纹联接质量的方法。

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The construction plan, process flow, construction method, pre control of jacking quality and matters need attention are elaborated in detail.

并对其施工方案、工艺流程、施工方法、顶进质量的预控和安全注意事项作了详细的阐述。

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This has been achieved through extensive development, strict quality control, and a stringent pre-production testing requirement of 400 drives passing 500 hours of intensive tests with zero errors.

ENGADGET: Plextor trots out M5M series mSATA drives at CES