two-arm clasp

例句：

1. 1. The two-arm clasp holds the door securely shut.
   这个双臂扣子能牢固地锁住门。
2. 2.He wore a two-arm clasp on his coat to keep it closed.
   他穿着一件带有双臂扣子的外套来保持它关闭。
3. 3. The designer used this two-arm clasp to add a touch of elegance to their collection.
   设计师使用这个双臂扣子来给他们的系列增添一丝优雅。