This paper develops the enumeration number of laddertrack.
提出梯线方案的枚举数。
2
In this paper, the use range and the present situation of the international research are investigated, and the damping principle of laddertrack system is analyzed.
本文对梯形轨枕轨道的使用范围和国际研究现状进行了调研,并对梯形轨枕轨道系统的减振原理进行了分析。
3
The emergency escape device for high rise building consists of jack ladder, guide track, chain wheel, speed varying mechanism, hydraulic speed regulating controller, etc.