knuckle

掌圍;掌指關(guān)節(jié)

knuckle gear

圓齒齒輪

knuckle yarn

結(jié)子花線/疙瘩花線

lower knuckle

下部彎曲

knuckle arm key

關(guān)節(jié)臂鍵

knuckle thrower

鉤舌鎖鐵

coupler knuckle pin

鉤舌銷/車鉤關(guān)節(jié)銷

knuckle pin bracket

叉節(jié)銷托

knuckle flange felt spring

關(guān)節(jié)凸緣氈彈簧