| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a double cylinder which can be installed in a narrow place while the shape of an inflow opening, spaces for an external hollow molded body and an internal cylinder, and a flow rate are secured. <P>SOLUTION: The double cylinder has a hollow molded body having a flat cross-sectional shape and the internal cylinder installed in the hollow molded body. The internal cylinder has an external cylindrical part protruding from the opening of the hollow molded body outside the hollow molded body and an internal cylindrical part protruding from the opening inside the hollow molded body. The cross-sectional shape of the external cylindrical part is different from that of the internal cylindrical part. The cross-sectional shape of the internal cylindrical part is as flat as that of the hollow molded body, and the inside area of the internal cylindrical part is not smaller than the inside area of the external cylindrical part. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
