Totally closed piston ring set
The utility model relates to a totally closed piston ring set. A piston ring (1) consists of a round ring body (2) and an opening (3), wherein the opening (3) is provided with a ring body opening (4); the opening (3) is greater than the ring body opening (4); seams are arranged between the ring body...
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Format: | Patent |
Sprache: | chi ; eng |
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