| 摘要 |
A valve plug or valve seat combination having a large number of small fluid conducting passages in a multitude of horizontal planes and comprised of a stack of identical stampings having alternate sectional patterns consisting of a trapezoidenal vertical opening in some and slotted radial opening in other sections and which, when circularly displaced to one another, form internal vertical fluid conducting passages together with said horizontal fluid passages, both vertical and horizontal passages being interconnected.
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