recording micrometer

例句：

1. 1.The doctor used a recording micrometer to measure the patient's blood pressure.
   医生使用记录微米计来测量病人的血压。
2. 2. The engineer used a recording micrometer to measure the length of the beam.
   工程师使用记录微米计来测量光束的长度。
3. 3. The scientist used a recording micrometer to measure the density of the material.
   科学家使用记录微米计来测量材料的密度。