| 摘要 |
The drum 10 of its casing 1 comprises an opening 15 beneath which is placed a bracket 3, the transverse web of which is hollowed out with a slit 30 allowing the passage of the strap 2. Two substantially triangular tongues 34, 35 stand up normally to the drum 10 on either side of the slit 30 in order to define a constant-spacing passage. <IMAGE>
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