Designed a set of electro-hydraulic proportional system of forming hydraulic press of heteropolarity multilevel magnetic ring, established the mathematical model of the top plunger cylinder.
设极异方型多级磁环成形液压机电液比例控制系统,建立模数学模型。
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These adaptive changes appear to have strengthened interindividual affiliation, increased male-male tolerance and facilitated the stepwise aggregation from independent one-male, multifemale groups to large multilevel societies, the article said.
文章说,这些适应性变化似乎加强了个体间联系,增加了男性-男性容忍度,并促进了从独立一男多女群体逐步聚集到大型多层次社会。