a small parachute, used to pull a larger one from its bag 引导伞，拖曳伞（将大降落伞从袋子中拉出的小型降落伞） Word Originearly 18th cent. (originally a whaling term denoting a piece of stout board attached to a harpoon line, used to slow down or mark the position of a harpooned whale): perhaps related to drag.