Ventilation resistance and ventilation isobar in the workings were measured with barometer.

采用气压计混合读数法测定了综放采场区域的通风阻力及通风等势图.

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Result The Eustachian tube ventilation resistance was found to have a large respective divergence ( 1.20～6.86 kPa ).

结果咽鼓管通气阻力个体差异较大(1.20～6.86kPa ).

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Through ex - ample of lowering ventilation resistance in Nanfeng shaft, application process is introduced with graphic method.

通过对南风井井筒的降阻改造实例, 介绍了图解法的应用过程.

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