screwdown structure

例句：

1. 1. The new designof the product uses a screwdown structureto make it easier to install.
   新产品的设计采用了一种螺丝钉式结构，使其更容易安装。
2. 2. The screwdown structure allows for easyadjustment and maintenance.
   这种螺丝钉式结构便于调整和维护。
3. 3. The screwdown structure is apopular choice for those who want to keeptheir devices secure without sacrificingportability.
   对于希望保持设备安全而不失便携性的用户来说，螺丝钉式结构是一个受欢迎的选择。