What gas meter was used in Kunshan Xingang Garden in 2004?

In 2004, Kunshan Xingang Garden used an old-fashioned membrane gas meter. According to relevant public information, in 2004, Kunshan Xingang Garden used an old-fashioned membrane gas meter, which was measured by a mechanical roller, and the mechanical roller was operated according to the gas consumption. Every time a unit is used, the number of rollers is increased by one, and finally the gas measurement record is realized.