| 摘要 |
<p>PURPOSE:To prevent an exhaust pipe from biasing and deteriorating in its flexibility and strength, by forming a gap part by interposing hard particulates between an inner layer tube and an outer layer tube of a flexible tube for the exhaust pipe. CONSTITUTION:When hard particulates 13 such as sand and metallic powder are interposed between an inner layer tube 11 and an outer layer tube 12, the inner layer tube 11 corresponding to the particulates 13 is deformed inward in a protruded state and a minute gap is generated. Air or oil, therefore, between the inner and outer layer tubes 11, 12 swallen through the gap is fled outside throug a through hole 14. Deformations, therefore, of the inner and outer layer tubes 11, 12 due to swelling of air can be prevented.</p> |
