| 摘要 |
<p>An exhaust muffler comprising: an inside pipe-shaped member forming part of an exhaust flow path for an internal combustion engine; and an outside pipe-shaped member configured so as to cover the outside of the inside pipe-shaped member, having a prescribed interval provided therebetween. An upstream-side end section of the outside pipe-shaped member is joined to the outer peripheral surface of the inside pipe-shaped member. The inside pipe-shaped member has a plurality of inside through-holes arranged along the axial direction thereof, having prescribed intervals therebetween in the axial direction. The outside pipe-shaped member has at least one outside through-hole, further on the upstream side than the most upstream inside through-hole among the plurality of inside through-holes.</p> |
