Static analysis of Model LCJ1250 chain pumping unit indicates that the rather low reliability of the unit is due to the premature failure of the path chain caused by the action of lateral bending.
对LCJ1250链条抽油机的静力学分析与计算表明，由于轨迹链条承受侧向弯曲作用而早期失效，造成抽油机可靠性低。
In the dynamic pricing, on the basis of spider web model, we study the dynamic pricing mechanism of demand directing industrial chain and reveal the dynamic economic action.
在动态定价研究中，以蛛网模型为理论依托，探讨了需求导向型产业链内部的动态定价机制，揭示了产业链运行的动态经济活动。
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