12 Automotive structural parts, namely, floor, ceiling and wall linings, covers for seating furniture and linings for interior rooms, prepared with the use of leather, imitations of leather and/or leather fibers; railway car structural parts, namely, floor, ceiling and wall linings, covers for seating furniture and linings for interior rooms, prepared with the use of leather, imitations of leather and/or leather fibers; boat and ship structural parts, namely, floor, ceiling and wall linings, covers for seating furniture and linings for interior rooms, prepared with the use of leather, imitations of leather and/or leather fibers, and vehicle seat covers, all prepared with the use of leather, imitation leather and/or leather fibers