... xylene, TVOC, NMTHC)Natgas, Artificial Gas, Coal-Mine Gas, LPG, Mixed Gas, High Purity Gas (Ar,He,O2,N2,CO2)Food ... and pressure displaying functions.3.SEGC9310 gas chromatograph using a double stable pneumatic system, single packed column structure and ... can be adjusted independently.4.SEGC9310 gas chromatograph column with microcomputer temperature control system and excellent anti-interference, anti ...