| 摘要 |
The mounting box, from the base wall of which there rise, towards the outside, sleeves (2, 3), at least two of which serve for the friction insertion of the ends of respective tubes (6), the other end of which passes into identical sleeves of an identical box. The base of said sleeves is closed by a breakable wall, the removal of which permits communication with the interior of the box. <IMAGE>
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