Polyethylene solutions are extruded through a multi-orifice spinneret into a cross-flow gas stream to form a fluid product. When a programmer applies for the certification and registration of a developed program, a gateway sends a checking program for checking the validity of program to the programmer. The annular piston of the engine is configured to reciprocate in the combustion chamber. The rotor has a shaft extended outwardly from the second housing and disposed in the accommodating space. A casing defines an interior space of the media processor.