The theory casting projects as one-off operational work seems to insist upon the necessity of a guiding, management-produced, task-level master plan.
理论认为项目是一项一次性的工作，有必要制定一个以指导、管理为导向的任务级别主计划。
A model of furnace plan based on casting plan was established, which was converted from mixed integral program problem to linear program problem.
建立了基于浇次计划的炉次计划模型，经过变换，将混合整数规划问题转化为线性规划迭代求解问题。
Based on the casting process of bed, the actual lathe work condition, stiff and inherent frequency, we discuss feasibility of each plan.
依据床身的铸造工艺、车床的实际工作状况、刚度和固有频率等论证每个减重方案的可行性。
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