名词
中文翻译：Unknown
同义词：
['coal product type', 'coal product type classification', 'coal product types']
例句：
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1.The company's new coal product type has been well received by customers.
该公司的新煤炭产品类型受到了客户的热烈欢迎。
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2.The research on the product type of coal is crucial for improving energy efficiency.
对煤炭产品类型的研究对于提高能源效率至关重要。
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3.The production process of this coal product type is more environmentally friendly than others.
这种煤炭产品的生产过程比其它的更环保。