window fastener of metal

例句：

1. 1.The window fasteners are securely attached to the frame.
   这些窗框固定件牢固地附着在框架上。
2. 2.The window fasteners were designed to be easy to install.
   这些窗框固定件设计得易于安装。
3. 3. The window fasteners have been tested for strength and durability.
   这些窗框固定件已经经过强度和耐用性的测试。