文章主要论述了公路机械维修方面的问题。
This article mainly discusses the issue of road maintenance machinery.
文章主要论述了如何做好无机化学实验教学工作，从而培养出一批高素质的化学人才。
This text primarily discusses how to do the work of the inorganic chemistry experiment teaching well, thus educates some talented persons in chemistry.
文章主要论述了如何提高起重机的设计水平，提出了桥式起重机的参数化模型的建立以及实现。
This article mainly elaborate how to enhanced the hoist crane design level, proposed the bridge type hoist crane parameterization model establishment as well as the realization.
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