| 摘要 |
<p>The present invention relates to a fabrication method of a window frame to reduce concentration of radon in room air. The present invention provides a technique capable of lowering the concentration of radon in indoor air through indirect ventilation so that everyone can easily use. Technical solution necessary for implementing the invention, the fabrication method of a window frame reduces the amount of radon entering the room through the crack even if the part of the building, such as floor vent directly to the window opening by at least will also radon present in the room is ventilated in an indirect manner but substituting dilution is to ensure that the effect lasts 24 hours.</p> |
