set-up scale instrument

例句：

1. 1.The engineer set up a scale instrument to measure the weight of the material.
   工程师设置了一台秤来测量材料的重。
2. 2. The doctor set up a scale instrument to weigh the patient's body mass index.
   医生设置了一台秤来称量病人的体质指数。
3. 3.The scientist set up a scale instrument to measure the density of the liquid.
   科学家设置了一台秤来测量液体的密度。