No commutator motor is a new variable-speed motor, its adjustable-speed performance is more advantage than dc system.
无换向器电动机是一种新型的可调速电机，其调速性能优于直流调速系统。
Providers rotation torque to 17,500 ft-lbs (23,727 Nm) with variable rotation speed to 180 RPM for exceptional horizontal and direction drilling performance.
最高转矩17，500 英尺·磅（23，727 牛顿·米），可变转速最高180 转/分，带来无与伦比的水平钻井与定向钻井性能。
Variable nozzle turbocharger (VNT) can improve the low-speed performance and emission of turbocharged diesel engine. Turbine experiment of JK90S turbocharger with rotating vanes was undertaken.
将所设计的JK90S转叶式可变喷嘴涡轮增压器进行了涡轮性能试验。
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