Based on the study of the single hook model of conveyor belt, this paper discusses the double hook model, uses the distribution columns method to calculate the conveyor belt efficiency of double hook model, and finally gets the same result: conveyor efficiency D≈1- n22m2 , anti-efficiency E≈n22m .%本文在研究了传送带单钩模型的基础上，讨论了双钩传送带模型，利用分布列法计算了双钩模型的传送带效率，得到了结果：传送带效率D抑1- n22m2，反效率E抑 n22m 。
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