... , these separate ways can be adjusted independently.4. GC9310 gas chromatograph column with microcomputer temperature control system and excellent anti-interference ... Gas generator of nitrogen, hydrogen,air & Gas purifierPacked columnsCapillary columns Chromatograph workstationSeptumLiner InsertSyringeConversion furnaceShunt / unshunt samplerPlane six-way valveDeoxidizing tubeBubble meter ...