n.测距仪(测远仪)
On a submarine there was no more precise rangefinder. 在潜艇中，没有比他们更精确的测距仪了。
To ensure the accuracy and reliability of the laser rangefinder, it is necessary to calibrate it regularly. 摘要为保证激光测距仪的精度和可靠性，必须要对它进行定期检定。
