Tender For corrigendum : work of recalibration of various instruments and glassware - work of recalibration of various instruments and glassware, digital thermo hygrometer, wet & dry thermometer, hydrometer, digital thermometer, electronicdigitalbalance, weight box, thermo couple for oven, automatic beauratte plane, automatic beauratte amber colour, all types of glasswares, glass thermometer, ph meter, turbidity meter, conductivity meter, refrigerator