| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a silencing pipe with a sufficient noise insulating function and excellent durability, wherein a stain and a crack on the outermost layer are prevented. <P>SOLUTION: In the silencing pipe consisting of a synthetic resin inner layer pipe 11 and an elastic synthetic resin outer layer pipe 12, the surface of the outer layer pipe 12 is coated with a titanium oxide photocatalyst 13, and a concave groove part is formed on one surface of the inner layer pipe 11, the contact surface with the outer layer pipe 12. <P>COPYRIGHT: (C)2003,JPO</p> |
