On the basis of research on the tooth -shape of single stage seal, a new type tooth - shape of multistage seal is suggested.

在对磁流体单级密封齿形研究基础上，提出了一种新型多级密封齿形结构。

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This pump is of horizontal single stage and single suction type with radial split, axial suction and radial discharge. It is fully enclosed and leakage free.

该型泵为单级、单吸、卧式、径向剖分，轴向吸入、径向排出。全密封，无泄漏。

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The Results showed that the annual change of the actual evapotranspiration was in single-peak type, the peak value occurred during booting flower stage of corn.

结果表明，辽宁省农田蒸散量年内呈单峰形变化，峰值出现在玉米抽雄开花期。

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