The invention relates to methods for treating ceramic surfaces to decrease their wettability by aqueous solutions. Each data stream of the transmission data is transmitted using the transmitting paths, and the transmission qualities of the transmitting paths are detected to decide whether the space-block encoding module works or not. A tee has a top portion in which the bottom portion of the top tube is fitable. The bit stream demultiplexer includes similar demultiplexing integrated circuits. The server searches the database for the title of the music corresponding to the received information, and returns the result to the terminal. Multiplexing circuitry that allows reversible connectors to be used may also be included.