Knuckle joint
volume
British pronunciation/nˈʌkəl dʒˈɔɪnt/
American pronunciation/nˈʌkəl dʒˈɔɪnt/

"knuckle joint" 的定义和意义

Knuckle joint
01

a joint of a finger when the fist is closed

knuckle joint definition and meaning
02

a joint allowing movement in one plane only

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