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ladder
stairs
going to several places in succession (e.g. barhopping)
階子を壁に立てかけて二階に上がった。
I leaned the ladder against the wall and climbed to the second floor.
倉庫の奥から折りたたみ式の階子を出した。
I brought out a folding ladder from the back of the warehouse.
階子の上に立って電球を交換した。
I stood on the ladder and changed the light bulb.