合理传用燃料 Heli chuan yong ranliao 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 E37/653 Collection Landsberger collection Notes From series Energy conservancy science popularization wall charts (节能科普挂图), published in 1981. Use coal (briquettes and lower ignition briquettes) for heating and cooking, electricity for lights, gas for cooking and hot water. Theme Environment