| 摘要 |
This disclosure refers to improvements in the manufacture of a wiping ring comprising a grooved ring segment having an expander spring therein that presses radially all the exterior circumference of the segment against the wall of a surrounding cylinder and which radial pressure is graduated by the thickness and section of the expander. The segments are manufactured by compression, by means of a die-mold, the parts of which are partially or totally interchangeable.
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