主级数 [
zhǔ jí shù]
[数] principal series
- 在C6143型普通车床主传动系统中,由于传动比设计不够合理,致使主轴转速级数分布不均;
Due to the unreasonable design of the transmitting ratio in the major transmission system of lathe C6143, the progression of the spindle speed is asymmetrically distributed.
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