Kelvin bridge has the virtues of high sensitivity, precision reading and convenience to use.It is effective tools to measure the electrical resistivity and magnetoresistivity.
In the practice of production and application, for the convenience and intuitivism of operation, some factories require simple notation on the serial number of pricker.
This paper discusses the structure,functions,characteristics and the convenience of individual drugs parcel for seawise soldier.The parcel can be used for peacetime training and wartime service.