... 确定成焦性试验 coking test 非结焦性煤 open burning coal 焦值, 结焦性 coke value ...
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open burning coal
露天燃烧煤
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Almost half of people in the world cook their food and heat their homes by burning coal and biomass in open fires or basic stoves.
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