| 摘要 |
At least one lateral face (for instance 5) has a female assembly means (8) designed to coact with an assembly stud (7) provided on another element and comprising a body (71) ending with a head (72) which is wider than said body, the female assembly means (8) consisting in a hollow zone having a first part (81) which is wider than the head (72) of the assembly stud and a second part (82) having a lesser width than that of the head of the assembly stud (7). The second part (82) of the female assembly means (8) has a housing (72) in its interior designed to receive tightly the head (72) of the assembly stud. In an advantageous example of the embodiment, said housing (83) is comprised by two internal ribs (84).
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