each carved in the form of a drum with swelling sides rising to a flat top, the sides bordered with a broad recessed panel neatly carved with interlinked double-rings, the rings decorated with striations simulating bamboo nodes, all between two double-bands of studded bosses

安思遠及江文葦，《臥石觀雲：中國古代石刻家具藝術》，台北，2003年，頁44-45