Patent specifications have two interpretations, broad and narrow. In a broad sense, patent specifications refer to the collective name for various types of specifications published by national patent offices or international patent organizations. Including application specifications that have not been reviewed for patentability, such as German patent specifications, Japanese patent gazettes, Chinese invention patent application disclosure specifications, etc.; and patent specifications that have been reviewed for patentability, such as U.S. patent specifications, former Soviet Union invention specifications, and Chinese invention patents. Instructions, etc. The patent specification is the main body of the patent document. Its main function is, on the one hand, to disclose new technical information, and on the other hand, to determine the scope of legal protection. Only in the patent specification can you find all the technical information for applying for a patent and the accurate legal information about the scope of patent protection. In a narrow sense, a patent specification refers to a patent specification that has been reviewed for patentability and granted patent rights.