calibration radio-beacon

例句：

1. 1. The calibration of the equipment is crucial for accurate measurements.
   设备的校准对于准确的测量至关重要。
2. 2. The engineer calibrated the machine before it was used in production.
   工程师在机器投入使用前对其进行了校准。
3. 3. The calibration process involves setting the instrument to zero and then measuring against a known standard.
   校准过程包括将仪器设置为零并使用已知的标准进行测量。