Silencer

摘要

A silencer (1) includes a smaller cylindrical member (2, 3) having a planar portion (2a, 3a) and a larger cylindrical member (8) arranged to closely contact at least a portion of the outer circumferential surface of the smaller cylindrical member (2, 3).
The larger cylindrical member (8) as seen in a direction orthogonal to its axis provides an oblate cross section having a major axis X and a minor axis Y and the smaller cylindrical member is arranged to have the planar portion (2a, 3a) traversing the major axis X of the larger cylindrical member (8).