... shortcoming缺陷、缺点 shortening operation（锻件）镦粗工序、顶锻工序 shortening process镦粗法、顶锻法 ...
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The utility model has simple structure, convenient use and manufacturing and high positioning accuracy, and is in favor of shortening operation time.
具有结构简单，制造和使用方便，定位精度高的优点，有利于缩短手术时间。
By studying some boring machining families, standard time datum for unit operation was set up. Some methods of shortening operation changing time were also presented.
通过对钻孔加工族的时间研究，初步建立不同工步单件加工时间的标准资料，并探讨节省作业转换时间的方法。
This application system plays an important part in improving the quality of technological process of complicated product assembly, reducing operation returns, shortening the period of devel.
该应用系统在提高复杂产品装配工艺设计质量，减少操作返工，缩短研制和批次制造周期等方面发挥了重要作用。
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