contact indication rod

例句：

1. 1.The contact indication rod is used to indicate when the device is in contact with the object.
   接触指示杆用于指示设备与对象接触时的状态。
2. 2. The contact indication rod was designed to prevent accidental contact between the two parts of the device.
   接触指示杆的设计旨在防止设备两部分之间的意外接触。
3. 3.The contact indication rod was replaced after it broke during testing.
   接触指示杆在测试过程中断裂后被更换。