| HS Codes | Unit Code | Unit | Descriptions in Chinese | Descriptions in English |
|---|---|---|---|---|
| 90311000 | 1 | 台 | 机械零件平衡试验机 | Machines for balancing mechanical parts, nes |
| 90312000 | 1 | 台 | 试验台 | Test benches, nes |
| 90314100 | 1 | 台 | 制半导体器件时检验用光学仪器及器具 | Instruments for inspecting semiconductor wafers/devices, photomasks |
| 90314910 | 1 | 台 | 轮廓投影仪 | Profile projectors |
| 90314920 | 1 | 台 | 光栅测量装置 | Optical grating measuring device |
| 90314990 | 1 | 台 | 其他测量或检验用光学仪器及器具 | Other optical instruments & appliances |
| 90318010 | 1 | 台 | 光纤通讯及光纤性能测试仪 | Testing instruments for optical telecommu/optical fibre performance |
| 90318020 | 1 | 台 | 坐标测量仪 | Coordinate measuring machine |
| 90318031 | 1 | 台 | 超声波探伤检测仪 | Apparatus for ultrasonic examinations |
| 90318032 | 1 | 台 | 磁粉探伤检测仪 | Apparatus for magnetic examinations |
| 90318033 | 1 | 台 | 涡流探伤检测仪 | Apparatus for eddy examinations |
| 90318039 | 1 | 台 | 其他无损探伤检测仪器（射线探伤仪除外） | Oth apparatus for non-damaging-structure exam,not diological |
| 90318090 | 1 | 台 | 其他未列名测量或检验仪器、器具及机器 | Measuring or checking instruments, appliances & machines, nes |
| 90319000 | 9 | 千克 | 品目9031所列仪器、器具及机器的零件及附件 | Parts & accessories of instruments/appl/machines of 90.31 |
