摘要 |
The invention relates to a silencer ( 1 ) comprising an outer porous filter ( 2 ) and an inner porous filter ( 3 ) arranged inside the outer filter ( 2 ). The silencer ( 1 ) is designed such that the relative positions of the filters ( 2, 3 ) can be changed. Air velocity and noise are counteracted when pressurised air flows through the filters.
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