Conclusion from this paper might be served as for theoretical base of characteristic design of some agricultural machinery working assemblies.

本文所得结论作为某些农业机械工作部件性能设计的理论基础。

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In the design graphics of agricultural machinery, we often deal with a oblique rod which plays a supporting role. In assembly drawing it is difficult to determine the form and position of the rod.

在农业机械的设计制图中，常涉及一根起支撑作用的斜杆，在装配图中由于它处于倾斜位置，难于确定它的形状和位置。

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Aiming to the problem of white pollution and using the method that combine agricultural machinery and agronomic together, we design a miniature machine for retrieving plastic film of tobacco seedling.

为此，针对残膜白色污染问题，采用农机农艺相结合的方法，研究设计了链条式烟田苗期地膜回收机。详细介绍了收膜机的总体结构及主要工作部件挑膜、起膜、送膜和卸膜的设计原理。

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