9027: Instruments & app for physical/chem analysis; inst for viscosity, hea

902710: Gas or smoke analysis apparatus 902720: Chromatographs and electrophoresis instruments 902730: Spectrometers, spectrophotometers & spectrographs usg optical radiati 902740: Exposure meters 902750: Instruments and apparatus using optical radiations (UV, visible, IR), 902780: Instruments and apparatus for physical or chemical analysis, nes 902790: Microtomes; parts & access of inst & app for physical or chem analysi 9027: Instruments & app for physical/chem analysis; inst for viscosity, hea