发动机气门开启角
Engine valve opening Angle
以上为机器翻译结果，长、整句建议使用 人工翻译 。
根据发动机特性实验结果研究了发动机扭矩和转速与燃油耗及节气门开启角之间的关系。
The relationships among the torque, the speed, the specific fuel rates of the engine, and the throttle angle were studied on the basis of the engine performance test results.
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