The reason that supply air is not uniform for traditional air conditioning system of passenger car are analyzed, the design methods of static pressure supply air duct are given.

对传统铁路客车空调系统送风不均匀的原因进行了详细分析，同时介绍了静压送风道的结构，对不同类型的静压送风系统进行了送风均匀性测试。

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In order to guarantee uniform product weight and performances, flow balance of the runner system must be considered and all the cavities can be filled simultaneously under the same pressure.

对多型腔模具设计来说，为保证各型腔制件的件重、性能等质量指标均匀一致，必须对浇注系统进行平衡分析，以使浇注系统流动平衡，即各型腔在相同压力下同时充满。

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Return oil is equally divided, and uniform crankcase pressure and oil level are purposely kept in equilibration parallel system.

油气平衡式并联技术平均分配回油，并强调气压和油位的平衡。

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