| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a roofing material that enables air to be circulated on the backside of the roofing material and that eliminates the risk of getting broken or deformed when a person walks on the roofing material. <P>SOLUTION: In a roofing material A, a plurality of protrusions 17 are formed in the state of scattering almost throughout the backside of a roofing material body 10. <P>COPYRIGHT: (C)2013,JPO&INPIT |
