本文论述了HD型石油化工流程泵在开发研制过程中结构、水力设计以及密封问题上的思考，与化工行业的同行进行交流。
This paper discussed thoughts of structure design, hydraulic design and seal design of HD type petrol - chemical process pump, in order to communicate with experts in petrol - chemical industry.
MRPII从起源到应用一直是面向离散型行业，而对流程生产模式下的MRPII则研究较少。
MRPII is always oriented to the discrete manufacturing lines from the origination to the application. Study on MRPII of flow process production was less.
MRPII从起源到应用一直是面向离散型行业，而对流程生产模式下的MRPII则研究较少。
MRPII is always oriented to the discrete manufacturing lines from the origination to the application. Study on MRPII of flow process production was less.
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