介绍了几种新型黑色固体燃料制备技术。
The preparation technology of several kinds of new black solid fuels is introduced in this paper.
常温下为黑色固体，在一定的温度下凝固成很脆的具有贝壳状断口的固体，呈玻璃相；
Soft pitch is a black solid at a certain temperature , it will be solidified into a brittle solid with shell-like fracture.
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。
Pure wool when burning, smoke, no flame blister, smelly, ash is glossy black solid, with a broken finger gently press it.
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