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高级股票信息研究搜索引擎，以股票价格、选择、密告、图表、实时报价等。
The research discussed the influence of compression ratio and ignition advanced angle to performance of LPG engine.
本文研究了发动机压缩比和点火提前角对液化石油气发动机性能的影响。
The research discussed the influence of compression ratio and ignition advanced angle to performance of LPG engine.
本文研究了发动机压缩比和点火提前角对液化石油气发动机性能的影响。
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