The Spectrum of Abelian Categories and Reconstruction of Schemes

The Spectrum of Abelian Categories and Reconstruction of Schemes
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阿贝尔范畴的谱与图式的重构

DOI:
10.1201/9781003071730-18
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发表时间:
2020
期刊:
--
影响因子:
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通讯作者:
A. Rosenberg
A. Rosenberg
中科院分区:
--
文献类型:
--
作者:
A. Rosenberg

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这是一种方法和设备,用于在铁路轨道下的道碴中形成沟槽,通常被称为划痕,并且用于一次一个地抓住位于轨道顶部的新的纽带,将每个纽带依次拉向一侧,将其与沟槽相对定位并插入,所有这些都以最小(如果有的话)对道碴的干扰的一系列协调运动顺序进行。
This is a method of and apparatus for forming a trench in the ballast under railroad track, commonly referred to as scarifying, and for grasping new ties, one at a time, positioned on top of the rails, drawing each tie in turn out to one side, positioning it opposite the trench and inserting it, all in a series of coordinated movements in sequence with a minimum, if any, disturbance of the ballast.