| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent cracking of a resin layer appropriately by releasing the stress, concentrated on the resin layer, to a stress dispersion part at the upper and lower positions of the peripheral side edge of the metal plate.SOLUTION: A buried duct protection plate 10 includes a metal plate 12 and a resin layer 14 sealing the entire surface of the metal plate 12, and is buried above an existing buried duct 100 so as to protect the same. The resin layer 14 is provided with a stress dispersion part 20 formed by thinning the resin layer 14, on the inside of the peripheral side edge 12a of the metal plate 12.</p> |
