The paper makes an analysis and study on the cracks found with the bottom case of ZD6-E electric point machine in the vibration test and gives suggestion on the improvement.

本文对ZD6电动转辙机在振动试验中出现的底壳多处断裂进行了分析和研究，并提出了改进措施。

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As if to prove her point, Wirasinghe brings out the rusted shell of an electric sewing machine.

蚀了的电动缝纫机外壳，就好像要证明她话中的含义似的。

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This paper introduces a new type of automatic packing machine, its functions, its electric gas circuit, its principle of works, and the main point of design.

本文简要介绍了一种新型全自动包装机的性能要求及其电气路工作原理、设计要点。

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