| 摘要 |
<p>WC bowls are automatically cleaned and hygienically serviced by covering the bottom of the bowl with a chemically treated paper fabric. The fabric may be of natural or synthetic fibres or a powdery or granular agglomerate, and is pref. treated with an emulsion contg. an emulsifier, wetting agent, an odourless or pleasant-smelling disinfectant, e.g. benzoic, or salicylic acid derivs. a perfume and a dye.</p> |
