The results show that for the common pump control methods, the third power relation between the pump rotate speed(water volume) ratio and the shaft power ratio is not true;
分析结果表明，对于常用的水系统控制方式而言，水泵转速（流量）比与轴功率比的三次幂关系不成立；
New Shanghai One well placed mine shaft cage wellhead engineering construction company, the third Sino-Coal is responsible for installation of mechanical and electrical installation.
新上海一号井煤矿副井井口罐笼置入工程由中煤第三建设公司机电安装工程处负责安装。
The seepage cause in the adit and shaft of the third-stage pumping station of the general main line in YRDP is analyzed.
文中针对万家寨引黄工程输水隧洞及泵站平洞竖井存在的渗漏原因进行分析研究。
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