By designing a special impregnating tank, this paper has found out the proper impregnating technology for solving leakage problem of large thin-wall aluminium alloy casings.

设计了专用浸渗罐，摸索出了合适的浸渗工艺，成功地运用浸渗技术解决了大型薄壁铝铸件的渗漏问题。

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In this paper, the structure feature and principle of this special drill has been introduced. Its special design is very useful for drilling thin-wall pipe.

本文介绍了薄壁管专用钻头的结构特点及工作原理，其结构设计新颖，对薄壁管的钻削有实用价值。

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By means of illustration, from the view of parts distortion theory analysis, distortion prevention, this paper researches the numeric processing technic of thin-wall rectangular deep recessed parts.

文中通过实例从零件的变形理论分析、防变形工艺方法等角度出发研究了薄壁矩形深腔体零件的数控加工工艺。

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