Multiple transmitters generate repetitive waveforms having similar values of center frequency F and bandwidth B that are modulated with different information signals having bandwidth SB. The pipe has at least one air sampling opening allowing ambient air flow into the pipe and at least one fire sprinkler for ejecting a fire extinguishing fluid from the pipe in the event of a fire. The titanium dioxide produced is contacted with a metal oxide precursor homogeneously mixed with a solvent component downstream of the reaction zone to form a uniform coating of the metal oxide on the titanium dioxide particles. Namely, if a condition for receiving only a particular period of the particular content is satisfied, a user of the terminal can receive and use the additional content along with the particular content. Consequently, the present system reduces binding or jams within the magazine, improving performance and life of the magazine follower.