| 摘要 |
The subject of the present invention is a protective hood into which feeds a pipe bringing gas for pressurising and/or supply purposes, the hood being provided with at least one calibrated exhaust valve. According to the invention, the bottom part of the hood comprises a plastic collar 5 which possesses flat pleats 6 joined together by an elastic band 7 integral with the collar or points at more or less regular intervals. <IMAGE>
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