N a fine charcoal pencil or stick made from the spindle tree 炭笔
The liquefaction experiment results showed that the oil production rate and conversion rate of the vitrain would be higher than the fusain.
液化试验结果表明，镜煤的油收率和转化率都要高于丝炭。
Vitrinite and inertinite were formed distinct peat swamp environment as main origin of vitrain and fusain, which was essential reason for liquefaction properties.
镜质组和惰质组分别作为镜煤和丝炭的主要物源，形成于截然不同的泥炭沼泽环境，致使结构和性质差异大。
The liquefied water production rate of the vitrain and fusain would be approximately equal and due to the partial reason, the hydroxyl strength of the vitrain and fusain would be approximately same.
镜煤和丝炭的液化水产率非常接近，其部分原因归因于二者所含的羟基强度近似相等。
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