单词movable joint
un.: 伸缩缝；动关节；活节网络: 活接头；活动关节；活动接头
活节
动关节
伸缩缝
and the tail of the wrench is hinged with the movable joint.
所述扳手尾部与活动接头铰接。
The formations of auto-jumping in bridge movable joint and the preventions
桥梁伸缩缝跳车的成因及防治