更新低效设备 Gengxin di xiao shebei Designer Wang Yaonan (王耀南) Date 1981 Publisher Kexue puji chubanshe (科学普及出版社) Size 77x53 cm. Call nr. BG E37/658 Collection Landsberger collection Notes From series Energy conservancy science popularization wall charts (节能科普挂图), published in 1981. Theme Environment
