sjb
- 网络圣华金
sjb-
Would you like to suggest new policies for staff training in SJB ?
你能对员工培训提出一些新的培训制度吗？
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SJB is the first firm to develop Drawn Cup needle roller clutch and bearing assemblies series .
是国内最先开发单向滚针离合器和轴承组见系列产品的工厂。
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A new-type deep well pump SJB was developed by improving the structure of QJ . Based on the research on SJB , a new hydraulic design-impeller head maximum approach and twisted return guide vane method were proposed .
在改进QJ型深井离心泵结构的基础上，研究提出了一种SJB型新结构深井离心泵及其特殊的水力设计方法，即叶轮的极大扬程设计法和扭曲反导叶法。