.bk J01 .fl U821mS1.j .fd object description .ed U821 .ei mS1 .rd U821 .ri mS1 q 830.3 df gr ds broken half of grinding stone, one side is flat due to the use, the other one convex. lg 14.3 ht 12.1 th 4.9 wm li co gray cn broken q 864.8 df gr ds broken fragment of grinding stone, one side is flat, the other one convex lg 14.3 ht 19.1 th 4.5 wm li co gray cn broken