请再查看一下关于错误的堆饯追踪，并且查看一下这个错误出现在编码哪里。
Please review the stack trace for more information about the error and where it originated in the code.
饯对于其他网站或链接的使用：本公司网站服务可能会提供由第三方发起并维护之特定互联网站(简称网站)的链接。
Use of other sites or links: This service may provide links to certain Internet sites (the "sites") sponsored and maintained by third parties.
本文应用特征线法为常见的下开式水锤消除器建立了数学模型，并结合工程实饯对水锤消除器的选取进行了寻优计算，取到了较好的消锤效果。
In this paper, the author establishes a water hammer arrester mathematical model, and applies it to engineering. Optimized calculation shows that the prevention method is effective.
本文应用特征线法为常见的下开式水锤消除器建立了数学模型，并结合工程实饯对水锤消除器的选取进行了寻优计算，取到了较好的消锤效果。
In this paper, the author establishes a water hammer arrester mathematical model, and applies it to engineering. Optimized calculation shows that the prevention method is effective.
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