Indexes of guidance effectiveness were given by treating the detection distance as a random variable in whole guidance stage.
以发现距离作为整个导引阶段的随机变量，提出导引效能指标。
The development and experiments of electronic controlling system for variable rectangular E-beam lithography and lasser positioning stage are summed in the paper.
本文总结了用于可变矩形电子束曝光机激光定位工件台电控系统的研制及实验经验。
Hot ingots are often heated in forging furnaces, the feature of which is one-stage type in a constant temperature furnace and two-or three stage type in a temperature-variable furnace.
锻造钢锭多采用热锭加热，其特点是在恒温炉中一段加热和在变温炉中两段或三段加热方式。
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