Through analysis on the causes of mechanical cylinder-knocking and fuel-oil cylinder-knocking of the diesel engine, this paper puts forward corresponding treating methods respectively.
2
本文研究石油机械企业多产品生产的规划决策问题，运用系统动力学的原理建立了相应的系统模型。
This paper researches the planning and decision making problem of petroleum mechanical multiproduct enterprises, and establishes the corresponding system model by using systematic dynamic principle.
3
主要经营粮油机械和农业机械。
Mainly engaged in grain and oil machinery and agricultural machinery.
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