| 摘要 |
The invention concerns an adjustable plastic assembly for maintaining elements such as electrical installation boxes between form panels, comprising two opposite elements (1, 2; 1a) coaxially maintained by means of a connection (3) capable of elastic deformation which links their bases, characterised in that said connection (3) consists of two large and flattened ductile rings each mounted on said bases, and connected by two matching spacing members (9, 9') capable of being separated and rigidly assembled in one or the other of at least two different axial positions.
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