保持器，夹头；锁片；止动螺母的英文

keeper

• 保持:    keep; hold; retain ...
• 器:    implement; utensil ...
• 夹:    double-layered; li ...
• 头:    5点就得动身 have to sta ...
• 锁:    lock
• 片:    a flat,thin piece; ...
• 止动:    locking; fastening
• 螺母:    nut source; origin ...