According to an aspect of the invention, an image forming apparatus comprises: a manuscript reading device reading a manuscript and converting the manuscript into an image signal; a recording device printing on paper; at least one rotating support member connecting the manuscript reading device and the recording device, and a wiring housing member housing the electrical wiring. Each of the local data collectors is coupled with a corresponding subsystem of the system. The tuning rod is arranged centrally on the chamber cover, above the sample carrier, and the at least one sensor is arranged on the free end of the tuning rod, opposing the chamber cover. The search component includes a results list database, an exact match search, a natural language processor, and a full text search. Replacement of the water chamber is made easy by detaching the sealing assembly. A rubber composition comprising the diene rubber and a diene rubber having an Mw of 2,000 to 90,0000 andor an oil extender for rubber has good processability and can give a rubber vulcanizate having high tensile strength and good abrasion resistance.