Strict economy in coal, gas, and electric light.
严格节约煤、汽油和照明用电。
The light and heat energy from coal comes from the sun in a roundabout way.
煤所产生的光能和热能间接地来自太阳。
The adjuvant is coal oil, light diesel oil or capryl alcohol.
所述的辅助药剂为煤油或轻柴油或仲辛醇。
Boiler can use light oil, heavy oil, natural gas, liquefied gas and urban coal gas.
锅炉适用轻油、重油、天然气、液化气、城市煤气等燃料。
Boiler can use light oil, heavy oil, natural gas, liquefied gas and urban coal gas.
锅炉适用轻油、重油、天然气、液化气、城市煤气等燃料。
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