It consists of layers of transparent hydrogel electrodes sandwiching an insulating elastomer sheet. It consists of thin wafers sandwiching a sweet filling. NPN transistors have two layers of n-type semiconductors sandwiching a p-type semiconductor. PNP transistors have two layers of p-type semiconductors sandwiching an n-type semiconductor. However, layer-by-layer construction need not mean the sandwiching of many layers together. Kanchan is made by sandwiching composite panels between Rolled Homogenous Armour (RHA). Stars are scored by sandwiching the stars between two matching blocks. Oscar Robertson then scored the next two Bucks baskets, sandwiching a Jo Jo White jumper. Sandwiching one player between two others also constitutes a foul. There are exceptions, such as uranocene, which has two cyclooctatetraene rings sandwiching a uranium atom. Three main domains are found, with two thiamine pyrophosphate sandwiching a DHS-like NAD/FAD-binding domain. There are alternate techniques that suggest "sandwiching" the valid MX records between non-responsive ones. This had the effect of "sandwiching" British Eagle's flights.