| 摘要 |
<p>The unit (2) has a filter element (22) placed inside a plastic envelope (21), and outlet piping projecting exteriorly from the envelope and extending to a pump connection (11). A recirculation duct is connected to the outlet piping and extended to a recirculation connection (15). A portion of the envelope, the piping and a portion of the duct are housed in a plastic shell (23) that is molded from a single-piece. The portion of the duct has a channel-shaped section (60). A closure plate (75) is fixed to the shell. The section and the plate form a tubular section (64) of the duct.</p> |
