分析了在采用杠杆放大行程的情况下，用仿形模板控制杆端轨迹的原理。
With the travel enlarged by means of profiling plates, how the orbit of the lever end is controlled by profiling plates is analysed.
本文提出了具有平行四连杆仿形机构的精密播种单体的数学模型，并使用该数学模型对精密播种单体作了动力学分析。
The mathematical model of the precision drill unit with parallelogram linkage was brought up and its dynamic behaviors were analyzed with this mathematical model.
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