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。

youdao

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。

youdao

This article briefly introduces the general pre-treatment technological process of bus painting, emphatically analyses the control elements which effect pre-treatment quality.

简要介绍客车涂装前处理的一般工艺流程，重点分析影响前处理质量的主要控制要素。

youdao

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