GC

RECORDING CHARTS USED ON MEDICAL INSTRUMENTS-NAMELY, ELECTROCARDIOGRAPHS, ELECTROENCEPHALOGRAPHS, CHROMATOGRAPHS, ELECTROMYOGRAPHS, OSCILLOGRAPHS, POLYGRAPHS, PNEUMOGRAPHS, RESPIROMETERS, SPECTROMETERS, SPECTROPHOTOMETERS, TONOMETERS, STERILIZERS, KYMOGRAPHS, OXYGRAPHS, SPIROMETERS, AND VITALOMETERS