充分利用余热 Chongfen liyong yure 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 E37/655 Collection Landsberger collection Notes From series Energy conservancy science popularization wall charts (节能科普挂图), published in 1981. Theme Environment Tags China poster Chinese propaganda 1981 education chart heat gear compressor friction recycling