以下为句子列表：
英文: By cooling soft pitch with water, solid pitch is obtained, which should be transported in bulk by trucks or by cargo train .It is in the category of dangerous product stipulated by the Ministry of Transportation.
中文: 中温沥青经水冷却后而得固体沥青，卡车或火车散装运输，按交通部危险品运输办法办理。
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英文: It is obtained by distilling soft pitch in flash column under certain pressure and temperature .
中文: 中温沥青经过在一定的压力和温度下进行闪蒸获得。
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英文: It is obtained by distilling soft pitch in modified pitch column under certain pressure and temperature after certain time heating.
中文: 中温沥青经过在一定的压力和温度下，经过一定时间热处理获得。
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英文: It will melt in a certain range of melting points ,but it has no definite melting point .Soft pitch has no thermal effect when solidified .
中文: 沥青组分极为复杂，大多数为三环以上的芳香族烃类，还有含氧、氮和硫等元素的杂环化合物和少量高分子炭素物质。
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英文: Soft pitch is a black solid at a certain temperature ,it will be solidified into a brittle solid with shell-like fracture.
中文: 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；没有一定的熔点，在一定的熔点范围内熔化，凝固时没有热效应。
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