Equipment and technology for installation of prefabricated drains were modified after repeated research and many offshore tests and a special type of mandrel for installation of prefabricated drains was successfully developed to have better solved the problem of"back-drawing of drains"when prefabricated drains were being driven through sand cushions and geo-fabric matting and into the soft soils.

This article aims at the reason and harm which is caused by up run of scraps.

Clinical study of the efficiency in stereotactic surgery for stubborn mental disorders with different target structures of Callosal gyrus;

To investigate feasibility and effect of schizophrenia treatment by stereotactic lesioning, CRW stereotactic apparatus and PICKER spiral CT were used to define nucleus location and RADONICS radiofrequency instruments were used to lesion different subnucleuses of amygdala and the front part of callosal gyrus.