Engineering and Technical Services
- 541330 ... Engineering Services
- 541711 ... Research and Development in Biotechnology
- 541713 ... Research and Development in Nanotechnology
- 541714 ... Research and Development in Biotechnology (except Nanotechnology)
- 541715 ... Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
- 541690 ... Other Scientific and Technical Consulting Services
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