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There is low speed area near the axle, its radial s peed field is small but still exists beyond the blade radius.
其径向速度虽然在桨径范围内较小,但在桨径外仍有一定值。
youdao
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There is low speed area near the axle, its radial s peed field is small but still exists beyond the blade radius.
其径向速度虽然在桨径范围内较小,但在桨径外仍有一定值。
youdao