根据山西省的实际情况，煤多而缺石油和天然气，电多而化工产品品种少等特点，提出山西煤层气的利用应主要用于生产车用燃料和化工产品，并对生产车用燃料和化工产品的途径进行了论述。
Based on the actual conditions in Shanxi Province, it is suggested that the coal bed methane should be used mainly for producing vehicle fuel and chemicals. The production methods are also discussed.
研究表明，对于柴油机气缺体这类薄壁铸造的复杂构件，进行有限元模态分析，需要采用很细的网格划分，才能保证较精确的结果。
The comparison indicates that the appropriate results can be obtained only when with fine enough meshing in Finite Element modal analysis, as the cylinder block is a complex and thin cast parts.
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