| 摘要 |
A silencer 1 for an exhaust system comprising a fluid outlet ( 14, 5 ) and control means for opening and closing the fluid outlet ( 14, 5 ). The control means may comprise a bi-metallic strip ( 2 ) with a rivet stopper ( 22 ) at one end. The fluid outlet may comprise an aperture ( 14 ) or a self-tapping plug ( 5 ).
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