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1·To actualize the functions listing, a PLW model is put forward to structure an Expert System.

为实现上述功能，提出了构造专家系统的PLW模型。

2·Through the design and experimental research of PLW-8 peripheral canned pump, the hydraulic design and structural design of this type of pump are introduced and the design main points are summarized.

通过对PLW - 8型旋涡式屏蔽泵的设计及试验研究，介绍了该类型泵的水力设计及结构设计，总结了设计要领，并将一些重要参数对泵性能的影响做了探索。