If the free pools have lots of connections, the maintenance threads will have a lot of work to do, which can significantly impact performance.
如果空闲池有许多连接，则维护线程需要执行许多工作，这会显著地影响性能。
Providing feedback on application development and maintenance work to improve individual and team performance.
提供关于软件开发及维护工作的回馈信息，以提高个人及团队的开发效率。
Sealing performance and operating life of the fracturing pump directly influence quality of the acidizing operation, and bad seal will result in great deal of maintenance work.
压裂泵柱塞密封性能好坏与使用寿命的长短直接影响压裂酸化作业的正常实施，密封不良将带来很大的维护工作量。
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