XW cyclone is also called outer rotation cyclone.

XW型旋风除尘器也称外旋型旋风除尘器。

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Wang x, Cheng XW, Fang SS, et al. Application of exponential smoothing model in forecasting influenza incidence [J]. China Tropical Medicine, 2011, 11 (8) : 938-939.

(in Chinese)王昕，程小雯，房师松，等。指数平滑模型在流感样病例预测中的应用[J]。中国热带医学，2011,11 (8)：938—939。

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