To investigate the soil resistance and the active location between the ridger and soil, the test was carried out in the soil bin by the means of orthogonal test.
采用正交试验的方法，对起土铲进行了土壤阻力室内土槽试验，并通过观察确定了起土铲的主要触土部位。
The characteristics, function, structure and principle of the BeiDou Dual-Satellite Navigation System are described, and the limitation of the BeiDou's active location in application is discussed.
介绍了北斗双星定位系统的特点、功能、系统组成和工作原理，说明了北斗有源定位方式在应用方面的局限性。
The characteristics, function, structure and principle of the BeiDou Dual-Satellite Navigation System are described, and the limitation of the BeiDou's active location in application is discussed.
介绍了北斗双星定位系统的特点、功能、系统组成和工作原理，说明了北斗有源定位方式在应用方面的局限性。
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