What are the introductions of old objects?

1, magnetic tape: magnetic tape is a kind of tape material with magnetic layer, which is used to record sound, image, digital or other signals. It is a magnetic recording material with the largest output and the widest application.

2. Black and white TV: Black and white TV is a kind of TV that can only display black and white. In the early days of TV development, including the recording of TV programs, the reception and display of TV sets, all can only reflect black and white.

3. Sewing machine: Sewing machine is a machine that uses one or more sewing threads to form one or more stitches on sewing materials, so that one or more layers of sewing materials are interwoven or sewn together.

4. Phoenix Bicycle: Phoenix Bicycle originated from 1897, the first bicycle shop in China with a history of one hundred years. The brand was born in the 1950s. In the process of research and development, we pay attention to independent research and development and pursue technological innovation.

5.BB machine: BB machine generally refers to pager. Called subscriber receiver in wireless paging system. It consists of superheterodyne receiver, decoder, controller and display.

6. Old-fashioned desktop computer: A desktop computer is an independent computer that has nothing to do with other components. Compared with notebooks and netbooks, mainframes, monitors and other devices are generally relatively independent and generally need to be placed on computer desks or special workstations.

7. Picture books: Picture books generally refer to comics. Comic books, also known as comics, comic books, picture books, simple books, doll books and so on. Comic book is an ancient traditional art in China, which was finally formed after the popularization of printing in Song Dynasty. Telling stories and portraying characters with continuous pictures is a reading material suitable for all ages, with a wide range of topics and diverse contents.