main throttle meaning in English

主节气门, 主油门

With the program the author also researched how the anti - surging regulating process is affected by the parameters of the main throttle , the vice throttle and the operating point of the pressure - increasing limiter
然后利用仿真程序对主、副油路节流嘴尺寸及升压限制器投入工作点等结构参数对防喘切油过程的影响进行了研究。
The conclusion is that the abnormity of the anti - surging regulating process is mainly due to the unstable burning of the firebox because of the intense changing of the regulating process . and the problem is resolved by means of modifying the diameter of the main throttle and the vice throttle
研究表明：发动机防喘切油过程异常的主要原因是切油过程油压变化过于剧烈导致发动机燃烧室燃烧不稳定，适当修正防喘调节器主、副油路节流嘴直径可以使这一现象得到改善。