... columnWorkstation Version: EnglishMajor application fields1. Building Indoor Environment Testing (Benzene, toluene, xylene, TVOC,NMTHC)2. Natgas ... ethylene, acetylene, carbon monoxide, carbon dioxide)6. Petrochemical Testing and Fine Chemicals (crude oil, gasoline, essence)Features1 ... control valve knob adjustment, intuitive, and good reliability.9. GC9310 gas chromatograph injector with two options ...