ball-and-socket joint
球臼关节
杵臼关节
万向接头
球形铰链连接
球窝接头
球与套接头
球窝节
滚珠轴承
方向接头
球状关节
ball and socket bearing
ball and socket coupling
ball and socket steering knuckle
ball and socket structure
ball and socket support
ball and-socket bearing
ball-and-socket bearing
ball-and-socket coupling
ball-and-socket structure
中华绒螯蟹(Eriocheir sinensis)
关节构造
ball-and-socket support