The generalized large well method is not applicable when the influence radius doesn't exit and the complicated hydrogeological condition is not fit to the condition of Dupuit well-flow formula.

但是当水文地质条件复杂，不能引用影响半径时，就不符合裘布依井流公式的适用条件，也就不能再用大井法计算排水量；

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Properties of PVC profiles and plastic doors and window are introduced, equipment, process flow, formula design and manufacturing technology for the production of the profiles are described.

介绍了PVC异型材和塑钢门窗的性能，阐述了异型材的生产设备、工艺流程、配方设计和生产工艺。

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Progress, principle and flow-formula, main error, application situation and prospect of bend pipe flowmeter are described.

主要叙述弯管流量计的进展、原理及流量公式、主要误差、应用情况以及前景等。

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The formula: have management borrow money against the assets and cash flow of a company, and use that money to buy a controlling stake of it.

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It would appear that building a strong Minor League system that produces a consistent flow of young, homegrown stars who stay with a team for their careers is a formula which produces more winning franchises than relying on high spending for aging free agents.

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