Abstract: An H-shaped frame is divided into a first and second guide channel by a partition plate and has a panel holder received in the second guide channel. The panel holder includes two clamping plates, each of which has a joining portion and a clamping portion that define cooperatively a space therebetween to receive an edge of a flat panel. A first engaging unit is formed on external surface of the clamping portion. The second guide channel has a second engaging unit which engages the first engaging unit when the panel holder is inserted slidably into the second guide channel.

Abstract: A door has a frame mounted therearound for connecting with an engaging member mounted adjacent to an opening in a wall. The frame has a guiding channel and a connecting member installed in the guiding channel for connecting with the engaging member. A slide piece is slidably provided in the guiding channel and screws are introduced into the connecting member for interconnecting the connecting member and the slide piece, and thus immobilizing the slide piece, so that the slide piece permits adjustment of the location of the connecting member relative to the channel.