Working principles of dual closed-loop tester and parameter design for its major parts are introduced and indoor simulation testing technique for walking tractor discussed.
本文系统地介绍了双闭环试验台的工作原理，主要工作部件的参数设计，并对手扶拖拉机室内模拟试验技术问题进行了探讨。
Combining the indoor study with the test-road study, this paper has recommended the parameter of choosing material and mixture design, which suit to the pasturing area road gravel base.
在结合室内研究和试验路研究的基础上，推荐了适合牧区道路粒料基层的材料选择参数及配合比设计。
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