| 摘要 |
Section for producing casings, characterised in that it has a cross-section in the form of an L and includes, on at least one of its outer surfaces, longitudinal fins 4 and on at least one of its internal surfaces longitudinal grooves 6-9-13 having specific functions. The lateral envelope of a casing is obtained by combining, head to tail, two identical lengths of the section and the joining of the two lengths, arranged head to tail, is obtained by plates held by self-tapping screws engaged longitudinally in half-closed grooves 6. <IMAGE>
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