Can the files copied by lawyers be shown to experts?

You can't. Lawyers are not allowed to show files to others. The case file is the trial data obtained by lawyers based on their specific identities and responsibilities, and cannot be shown to family members or other third parties. Archives are composed according to the similarities, differences and connections in the sources, time, contents and appearance of archives, including the cover of archives, contents of archives in volumes, archives in volumes, reference tables in volumes, etc. The cover items of the case file include: the name of the whole case, the category name, the title of the case file, the start and end dates of the documents in the volume, the storage period, the number of volumes (pages), the filing number and the file number. Some countries have unified regulations on the specifications of archives, such as the cover size of archives in China and the specific location of projects. The file directory in the volume is a table in which the titles and other characteristics of files are registered in the files, and the file arrangement order is fixed, usually before the files in the volume. The contents of documents in the volume include: serial number, document number, person in charge, title, date and page number. The reference table in the volume is a record of the file status in the case file, which is usually arranged after the files in the volume. The main items are: description of this volume, archivist, examiner, filing time, etc.