在这种情况下，进低速油针少许\和再检查怠速。
In this case, close the mixture screw a little and check the idle again.
主轴的进能量和转速是通过选速杆使主轴箱中的适当齿轮相啮合而控制的。
Spindle feeds and speeds are controlled by selector levers which engage the proper gears in the drill head.
模拟计算了各种工况下的发动机性能：怠速工况降低了残余废气系数，提高了进气流速，稳定性得到改善；
We simulate engine performance in various operating conditions:in idle condition, it reduces the residual gas coefficient and increases airflow velocity, so that idle stability is improved.
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