Engine pressure ratio (EPR), the ratio of inlet pressure over exhaust-let pressure measurements. The ratio is used as the primary parameter to set thrust on some engines.

发动机压力比(epr)，进气压力与排气压力值的比，某些发动机以此作为设定推力的主要依据。

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Gas flue suction and pressure to adapt, measuring points in the flue gas exhaust and the oxygen content to be corrected in order to maintain a certain excess air ratio, so that burning at its best.

使烟道吸力与煤气压力相适应，测量分烟道中废气的含氧量并加以校正，以保持一定的空气过剩系数，使燃烧处于最佳状态。

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