| 摘要 |
A wall-like component which is supported at opposite ends and exposed to thermal stresses has an elongated bilateral enlargement extending substantially parallel to a plane in which the component lies. The enlargement is oriented substantially perpendicularly to an imaginary distance line between the opposite ends. An elongated cavity extends within and codirectionally with the enlargement. The cavity is offset with respect to the enlargement in the direction of one of the ends of the component. The cavity further has a dimension-measured in a direction perpendicular to the plane of the component-which is greater than the thickness of a component portion adjoining the enlargement. As a result, upon breakage of parts of the enlargement under the effect of forces derived from heat-caused expansion of the material of the component, there is obtained a free edge of the component portion and a trough-like part formed together by remaining parts of the enlargement and the cavity for receiving the free edge.
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