The orthogoi al multilayer sandwich plate which provides considerable strength, stiffness and stability has been used in some important engineering structures, such as the composite material bridge.

The penetration length of the core melt in sandwich injection molding was investigated by changing the viscosities of melts and process parameters.

Compared with the commercialized push pull osmotic pump tablet, sandwiched osmotic pump tablet is easy in preparation with exempting identification of drug layer before drilling.