| 摘要 |
<p>PURPOSE: To provide a duct having silencing function, high in mechanical strength and easy to fit. CONSTITUTION: A hollow molding body is provided with a duct 1 and a muffler 1b integral with the duct 1 and formed of the same material, and terminal parts 1d, 1d' and a bellows 1e formed of relatively flexible different material are integrally formed at the duct 1. The product life is thereby lengthened, and a manufacturing cost is reduced.</p> |
