| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce assembling manhours of a ventilation duct mainly arranged in an automobile. <P>SOLUTION: This ventilation duct 10 includes a cylindrical member 12 formed in a cylindrical shape out of a ventilating raw material, and a tubular member 14 assembled by joining a first half 16 molded by a resin material and a second half 18 molded by the resin material, and having a storage part 22 for storing the cylindrical member 12. Columnar resonance generated by pressure pulsation when ventilating into the tubular member, can be restrained by the cylindrical member formed of the ventilating raw material. <P>COPYRIGHT: (C)2013,JPO&INPIT |
