经过分析和试验，开发出一种新的高效球化剂和一种新的高效复合随流孕育剂，制定出铸态生产工艺。
By analysis and experiment, a new type of noduler with high efficient and a new type of high mixed in-flow inoculant have been developed, and the as-cast production was made.
通过分析4105柴油机一度存在的曲轴箱通风不畅和机油消耗高的情况，提出了新的改进方案，经过试验验证，效果良好，并已在生产上应用。
A plan is proposed for improving crankcase ventilation and oil consumption of 4105 diesel engine. Verification test proved that the plan is effective and has been applied in mass production.
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