From the existing theory of the random medium model, every single local maximum point of a continuous random medium as the center point of each cave distribution area was taken, the two model characteristic quantities namely the local radius R and the local density p were introduced, simulated all sorts of different random cave medium models by the.

The boundary layer effect of the powder injection molding filling flow process was studied through local density measurement and SEM.

In this paper, the structure and features of several kinds usual end seal in sintering machine was compared.

The basic frame of digital circuit of electronic tag is introduced in the paper,and the detailed design charts of state machine and encryption part are also given.

It also analys the faults of unloading retrieval, top sealing and sole heating and introduces their maintainces.