Octangonal ring(gasket)
[化] 八角垫
🗣️ 情景例句
Jogging is a popular form of exercise.
慢跑是一种十分普及的体育活动。
Half a tale is enough for a wise man.
聪明人凡事只须听一半，就会明白究竟。
that a series of deep soundings was obtained in the Atlantic and the first samples were collected by dredging the bottom.
才在大西洋测得一个个海水深度，同时通过挖掘海底，取得了研究海底的首批样品。