The paper expounds the method of computer aided design for a conicograph acoording to the principle of the centrode for planar mechanism and the method of drawing the fixed centrode for planar mechanism with a “sliders dyad”.

The die extends the side slider structure and adopts the equidirectional moving structure of double slider which could realize the forming of side convex boss and the circular hole successfully,a.

The process structure characteristics and the quality demand of the battery covering of mobile telephone were analyzed, the structure and working process of the injection mold were introduced, the key points in designing the inner side delitescent sprue and designing the mechanism of the three orientation inner side core-pulling with the assembled slider were stated in detail.

This paper briefly introduced the key technique in the construction process of big-diameter and super-depth Cast-in-Situ pile for the 8000T block slipway of Tanggu basement.

Causes and controlling measures of Qingcaobei landslide in Three Gorges Reservoir;

In this paper,we firstly point out that semantic self-sufficiency,structure validity and translation sufficiency are the primary features of the bilingual chunks.