hexaterahedron

The application of military beam in dismantling old slab culvert;

六四梁在拆除既有盖板涵中的应用

Combining with construction of a expessway bridge,experment and construction about 64 type beam being used as pier and cap beam are analyzed in theory.

本文论述了六四式梁的扩展使用。

The paper describes a SEM/EDS method for observation and analysis of residues on bullet holes in textile products shotted with small-caliber pistol and model 77 pistol.

利用扫描电子显微镜和能谱仪（SEM/EDS）对小口径手枪、六四式手枪在纺织品上枪击孔洞处的附着物进行了观察分析,较好地解决了判定是小口径手枪还是六四式手枪射击问题。