In this paper, a core program package related for drawing pictures in micro computers with Oriented Geometry is presented to describe profile of machine parts in numerical control.
本文以有向几何为背景陈述一个微机绘图核心程序包，用它描写数控加工零件的平面外型轮廓，并在微机上绘制各种复杂的平面图形。
The artical introduces the combined form of service net, equipment demand, the quality and package of micro-file and the matters needing attention in the work of micrity.
介绍了服务网点组合形式、设备要求、缩微品质量、包装以及开展缩微工作应注意的问题。
According to package characteristics of long linear HgCdTe IRFPA detector, difficulties of the metal split micro dewar manufacture are discussed in the paper.
针对长线列碲镉汞红外焦平面探测器封装的特点，文章讨论了分置式微型杜瓦研制的难点。
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