Besides, the chemical structure, C/H value, and volatile matters of the coal all have direct effect on the distribution of PAHs.
直接影响煤中多环芳烃分布的因素还有煤的化学结构，煤的挥发份含量和煤的C/H比值。
Case calculations show that it is available to pick up well the process of anomaly change of H value before strong earthquake with selecting reasonable calculational conditions.
实际震例计算结果也表明，通过合理选取计算条件，可以较好地提取强震前H值的异常变化过程。
Case calculations show that it is available to pick up well the process of anomaly change of H value before strong earthquake with selecting reasonable calculational conditions.
实际震例计算结果也表明，通过合理选取计算条件，可以较好地提取强震前H值的异常变化过程。
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