"可开闭的吊桥" can be translated as "a retractable or drawable suspension bridge" or more simply and commonly, "a movable suspension bridge".
"Retractable" or "drawable" emphasizes the bridge's ability to be opened or closed.
"Movable" is a more general term that also conveys the idea of the bridge being capable of movement (opening and closing).
In many contexts, especially when the focus is on the operational aspect (opening and closing), "movable suspension bridge" would be a clear and concise choice.