| 摘要 |
A lamellate type low noise fluid resistance device comprising a stack of identical segmented ring-shaped plates having alternate sectional openings which, when circularly displaced with one another, form narrow horizontal fluid passages between the inner and outer diameters of said plates; said stack being bolted together with upper means to close the interior stack passage and lower flange means having a central opening and extending radially outward from the stack outer diameter.
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