| 摘要 |
The wall or casing is made from metal sheets (5,6) over a frame made from horizontal (2,3) and vertical (4) members. Each sheet has turned-over edges (9,10) designed to fit into channels in the vertical frame members, where they are locked in place by flexible wedges (11,12). The turned-over edges of the metal sheets are formed by two right-angled bends. The wedges are parallelepiped in shape, able to fit inside the turned-over edges, and are spring-loaded, for example, relative to brackets inside horizontal frame members. The sheets can be made, e.g. of stainless steel, plastic or other material.
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