这是最普通的触发器机构，但不是唯一在用的。一些地区已经在雷达，激光或空气导管传感器上取得成功。

This is the most common trigger mechanism, but it's not the only one in use. Some areas have had success with radar, laser or air-tube sensors.

youdao

这是最普通的触发器机构，但不是唯一在用的。一些地区已经在雷达，激光或空气导管传感器上取得成功。

This is the most common trigger mechanism, but it's not the only one in use. Some areas have had success with radar, laser or air-tube sensors.

youdao