A distributor which is mountable on a vehicle and is arranged for distributing a fluid from a reservoir to a number of nozzles through which the fluid is dispensed. The blower is located inside the enclosure and is adapted to draw air from inside the enclosure to produce an air flow through the fuel cell stack and establish a negative pressure inside the enclosure with respect to a region outside of the enclosure. The order of stacking of the components is determined to establish interfaces between the adjacent components. A model component can extrapolate a true 3D geometric model from the 3D object, wherein the true 3D geometric model is generated to include scaling in proportion to a size within the physical real world. The invention also provides a white matrix, a color filter and a reflective display element. An RF receiver includes a first mixer, a second mixer, an integratorsampler, and a signal generator.