No layering, crack, uneven surface for the product and it should be smooth black solid block.

产品应无分层、无开裂、无不均匀表面、细腻的黑色块状固体。

youdao

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。

youdao

Pure wool when burning, smoke, no flame blister, smelly, ash is glossy black solid, with a broken finger gently press it.

纯毛燃烧时无火焰，冒烟、起泡、有臭味，灰烬多呈有光泽的黑色固体，用手指轻轻一压就碎。

youdao

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

VOA: special.2009.12.07

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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