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sjb

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sjbsjb
  1. 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?

  2. 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。

  3. 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。