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普惠加拿大公司打算研制ＰＷ８００和ＰＷ６００，现正在进行其验证机试验研究；霍尼韦尔公司的ＡＳ９００系列发动机将在明年取得适航合证后投入使用；威廉斯公司正在研制的２种小推力发动机，何时取证将取决于飞机市场
Pratt & Whitney Canada plans to develop the PW800 and PW600 and is now conducting a pilot study of its validator; Honeywell’s AS900 series of engines will be operational by airworthiness certification next year; two small thrusts being developed by Williams Engine, when the evidence will depend on the aircraft market