micron hob

例句：

1. 1. Themicron hob is used to measurethe thickness of materials.
   微米棒用于测量材料厚度。
2. 2. The nanometer scale iscrucial for understanding the properties of matter.
   纳米尺度对于理解物质的性质至关重要。
3. 3. The micron hob was used to cut thewood into precise pieces.
   微米棒被用来将木材切割成精确的片状。