The type of the pump impeller and pump and centrifugal pump with a volume effect of particles suspended in mid-stream leaf out of date, do not hit any part of the pump, it is good non-destructive.
该型叶轮的泵兼具有容积泵和离心泵的作用,悬浮性颗粒在叶片中流过时,不撞击泵内任何部位,故无损性好。
Biochemical oxygen demand — the measure of the oxygen demand placed on a stream by any particular volume of effluent.
生化耗氧量——在由特定容量排放的小河中氧需求的测量。
Creates or opens a file, file stream, directory, physical disk, volume, console buffer, tape drive, communications resource, mailslot, or named pipe.
创建或者打开一个文件,文件流,目录,物理磁盘,卷,控制台缓冲,磁盘驱动器,通讯资源,邮槽,或命名管道。
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