hinge-rod

例句：

1. 1.The door is held open by a hinge rod.
   门通过一个铰链杆保持打开。
2. 2. The hinge rod was rusted and needed to be replaced.
   铰链杆生锈了，需要更换。
3. 3.The hinge rod broke during the heavy rain.
   在大雨中铰链杆断了。