The seal can be pre-formed in an elliptical shape or it can be formed into an elliptical shape by a retaining mechanism.
密封件可被预先变形为椭圆形或者可利用保持机构变形为椭 圆形。
The seal can be pre-formed in an elliptical shape or it can be formed into an elliptical shape by a retaining mechanism.
密封件可被预先变形为椭圆形或者可利用保持机构变形为椭 圆形。
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