Methods: One was A-ball whose abutment cooperated in the ball attachment, the other one was B-ball whose abutment separated from the ball attachment.

  • 方法:设计了两种球帽固位体:一种基台与球体为一整体(A-球),另一种基台与球体分离(B-球)。

  • 互联网摘选 2025-01-20 13:03:52

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