污染物从密封的里外面永久性的嵌入密封刃口上造成轴表面和密封唇缘的过早磨损；
From the outside of the seal of the pollutants permanent embedded seal on the blade surface and cause shaft sealing lip premature wear of margin;
根据本发明的实施例，一 种带有可拆卸式格栅的装置包括：设置于所述装置上的呈钩状的唇缘；
According to some embodiments of the invention, an appliance having a removable grille includes: a lip located on the appliance having a hook shape;
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