Geological radar is a non-destructive test instrument that detect the underground objects by the quality of discontinuousness of the underground medium.
Abstract: A concept of electro-thermal sensitivity is presented and the formula for the general nondestructive test system of bridgewire-electroexplosive device is derived.
According to the ZBO storage methods of other cyogenic liquids, an idea of centralized recondensation of liquid hydrogen in large containers by using cryocoolers was suggested.