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。
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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