Nanotubes are long, thin, sub-microscopic tubes made of carbon.
纳米管是一种比较长比较薄的亚显微管，主要成分是碳。
2
More particularly, the present invention concerns sub-microscopic, holographic, electron beam, mechanically ruled or other diffraction or straight line gratings.
更具体地说，本发明涉及亚显微、全息、电子束、机械控制的或其它衍射和直线光栅。
3
Traditionally they have worked in the mainly empirical sub-macro realm of unit operations, with some analysis of microscopic phenomena and macroscopic plant design.