“socket joints”简单造句，socket joints造句子

Ball and socket joints let your arm bones rotate at the shoulders and also allow the wheels of your car to be turned through the steering column.

"Linkage: In mechanical engineering, a system of solid, usually metallic, links (Bars) connected to two or more other links by pin joints (hinges), sliding joints, or Ball-and-socket joints to form a closed chain or a series of closed chains."