• As one of these components, friction modifier plays an important function for removing the dirt and colored substance attached to the surface of tooth.

    磨擦作为牙膏的组分之一,在其中重要作用,它能有效除去附着在牙齿表面污垢有色物质

    youdao

  • As one of these components, friction modifier plays an important function for removing the dirt and colored substance attached to the surface of tooth.

    磨擦作为牙膏的组分之一,在其中重要作用,它能有效除去附着在牙齿表面污垢有色物质

    youdao

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