Variable Pressure High Resolution Scanning Electron Microscope with Energy Dispersive and WavelengthDispersive Spectroscopy for study of conducting, non-conducting and biological samples Corrigendum 1 - Pre Bid Meeting Corrigendum 2 - Postponement of Pre–Bid Meeting Corrigendum 3 - Pre Bid Meeting Corrigendum 4 - Due date extended Corrigendum 5 - Due date extension Corrigendum 6 - Amendment in Technical Specification and Extension Of Bid Submission DateCorrigendum 7 - Due date extension Corrigendum 8 - Amendment in Technical Specification and Extension Of Bid Submission Date