maximum measuring depth

例句：

1. 1.The maximum measuring depth of the drill is 30 meters.
   钻头的最大测量深度为30米。
2. 2.The maximum measuring depth of the well is 500 meters.
   井的最大测量深度为500米。
3. 3.The maximum measuring depth of the tunnel is 100 meters.
   隧道的最大测量深度为100米。