A circular hoop sheet is punched with a spiral line, and one end of the spiral line penetrates through the connecting piece to contact a bottom plate to engage with the screw.
圆形箍片冲制有螺线一端穿过连接件贴靠在底平面并与螺钉相啮合。
Harry gazed at the circular patch of dusty floor enclosed by his hoop and tried hard to think of nothing else.
哈利凝视着他的木圈里那块灰扑扑的圆形地面，努力不去想其他事情。
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