nozzle throat

基本解释

The technical difficulty is accurately controlling the low-pressure rotor speed through adjusting nozzle throat area.
技术难点在于通过调节喷管喉道面积，精确控制发动机低压转子转速。
Results show that pintle could change the nozzle throat area and thus the motor pressure and thrust, which provided the capability for thrust control.
结果显示喉栓能够有效改变发动机燃烧室压力和推力，满足发动机推力控制要求。
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The scheme to control launch power is introduced for changeable depth launch of missile. It is to change the aeration area at the nozzle throat of high pressure chamber in launcher.
该文针对导弹变深度发射提出通过改变发射装置高压室喷管喉部的通气面积来实现发射动力可调。