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1·Remove cylinder head & piston, and con-rod;

活塞头、缸头和连杆拆除；

2·In the roof cover structure design, the steel tube con - Crete axis pressed rod was used as a press rod of network frame.

在屋盖结构设计中，用钢管混凝土轴心受压杆件作为网架的压杆。

3·The empirical formulae of main structure of the con-rod are derived;

并导出了连杆主要结构尺寸的公式。

4·The mechanism of self-loosening of con-rod bolts is discussed. It was found that trans-verse cyclic load is the most important factor affecting self-loosening of connecting rod bolts .

本文论述了连杆螺栓联接松动的机理，并指出横向交变动载荷是使螺纹松动的主要因素。