The dusts-removing abilities of four types of evergreen trees are ranked as: spruce, needle juniper, Sabina chinensis, and pitch pine.
四种常绿乔木的除尘能力等级排列为：云杉，针刺杜松，圆柏和柏油松。
Electrochemical intercalation of lithium into PAN based carbon fibers, petroleum coke, pitch coke and needle coke were studied by AC impedance method.
用交流阻抗法对PAN基碳纤维、石油焦、沥青焦、针状焦进行了嵌锂过程的研究。
The basic data of making needle coke crude from coal pitch is provided.
为利用煤沥青制取针状焦原料提供了有参考价值的基础数据。
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