The preparation technology of several kinds of new black solid fuels is introduced in this paper.

介绍了几种新型黑色固体燃料制备技术。

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Standing at the entrance of the tunnel I could see ahead of me a darkness so absolutely black it seemed a solid.

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It will be available in two classic designs: a two-tone black and silver, and a solid black.

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Petroleum coke is the solid black gunk left over at the end of the oil refining process.

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Now it's solid black--or blue, or orange, depending on the product or package.

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