| 摘要 |
A clean air duct (300) comprises a pair of tubular bodies (302, 310), ea ch tubular body having a pair of opposed ends (304, 306, 3I2, 314), one of the opposed ends of one tubular body having an annular ring (346) which terminates at an inwardly extending lip (340), the other tubular body having an outwardly extending rib (322) at one end; and a cuff (320) connecting the outwardly extending ri b and the inwardly extending lip. Another clean air duct (400) comprises a first blow molded tubular body (406) having a first open end (408) and an annular ring {450) which terminates at an inwardly extending lip (444}, and a second blow molde d tubular body (402) which has an open end (404). A cuff (412) connects the bl ow molded tubular bodies to one another wherein the lip (444) exerts a compressive sealing force around the second tubular body (402). Both tubular bodies (402 , 406) extend from the cuff (412) in the same direction.
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