secret screw joint

例句：

1. 1. The engineer useda special tool to make the secret screwjoint invisible.
   工程师使用一种特殊的工具使这个秘密螺丝接头变得不可见。
2. 2. The team workedtogether to create a secret screw joint thatcould withstand heavy loads.
   团队共同努力，创造了一个能够承受重载的秘密螺丝接头。
3. 3.The secret screw joint was hidden behind apanel, making it difficult for anyone todetect.
   这个秘密螺丝接头被隐藏在一个面板后面，使得任何人都难以察觉。