中文说明：对发动机点火提前角进行了计算，拟合。有很强的工程应用价值
English Description：
The ignition advance angle of the engine is calculated and fitted. It has strong engineering application value
The ignition advance angle of the engine is calculated and fitted
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中文说明：对发动机点火提前角进行了计算，拟合。有很强的工程应用价值
English Description：
The ignition advance angle of the engine is calculated and fitted. It has strong engineering application value