- a coupling between two rods, tubes, etc, that consists of a spherical part fitting into a spherical socket, allowing free movement within a specific conical volume
| 单词 | ball-and-socket joint |
| 释义 | WordReference Random House Unabridged Dictionary of American English © 2024 ball′-and-sock′et joint′ (bôl′ən sok′it),USA pronunciation
Collins Concise English Dictionary © HarperCollins Publishers:: ball-and-socket joint, ball joint n
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