The device has large filtering area, simple structure, and significant energy saving effect.
本装置过滤面积大，结构简单，节能显著。
E-mail filtering is becoming a research hotspot in network information security area.
电子邮件过滤是网络信息安全研究的热点。
E-mail filtering is becoming a research hotspot in network information security area.
电子邮件过滤是网络信息安全研究的热点。
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