| 摘要 |
Two sheets (38 and 39) having externally visible surfaces are joined together at their juxtaposed edges by a joining member (18) which is secured to their inner surfaces and which straddles the juxtaposed edges. The joining member (18) is formed with a groove (35) which extends along and is concave to the juxtaposed edges. The sheets (38 and 39) are turned down at the juxtaposed edges, the turned down portions (43 and 44) extending inwardly away from the externally visible surfaces and into the hollow formed by the groove (35). Externally visible bend radii are formed where each turned down portion (43, 44) meets its respective externally visible surface. |
