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一、引言生产的发展对各种机构提出了许多新的要求,如果采用单一机构往往使机构构件数目增多,机构过于庞杂且设计计算驱于复杂,或由于单一机构的局限性而根本无法满足生
I. INTRODUCTION The development of production poses many new requirements for various agencies. If the use of a single agency tends to increase the number of institutional components, the organization is too complicated and the design calculation is complicated, or simply can not meet the needs of a single institution due to its limitations