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Old Hindi Movie Dosti 1964 Download




dosti movie 1964 hindi movie, download, mp3 song, full movie Oct 24, 2020 - Dosti movie 1964 to be download link will be provided soon. Download movie dosti 1964 hindi movie on our website.This invention relates to a device for adjusting or positioning the operating head of a scanning electron microscope, such as a SEM (Scanning Electron Microscope) or a TEM (Transmission Electron Microscope), in the region of the object to be observed. In a scanning electron microscope the sample to be examined is irradiated with an electron beam. An electron beam is produced in an electron gun and deflected by means of a deflection unit. By scanning the sample with the deflected electron beam in a desired pattern it is possible to obtain a three-dimensional image of the sample. The electrical parameters, such as the diameter of the electron beam and the applied voltage, are adjusted to the appropriate values by means of potentiometers in order to achieve optimum imaging results. It is necessary, when examining an object with a scanning electron microscope, to ensure that the scan field is aligned correctly relative to the location of the object on the sample holder or specimen plate. This is normally achieved by aligning the sample holder or sample plate with respect to a point on the microscope base and by checking whether the sample holder or sample plate is positioned correctly with respect to this point. The object to be examined may be positioned on a sample holder or specimen plate in a plurality of positions. In this case it may be necessary, for example, to change the viewing direction to a side face of the object which is not visible when the sample holder or specimen plate is aligned correctly with respect to the base of the microscope. The viewing direction is normally selected by means of an operating head. The operating head has a stage which can be driven manually or automatically. In this case the operating head is arranged to move the sample in a suitable manner during the examination. The driving movement may be either in the vertical direction, as in a scanning electron microscope, or in the horizontal direction, as in a transmission electron microscope. Adjustment of the operating head is performed manually in most cases, because of the need to change the viewing direction. The adjustment is carried out by the operator using optical or electronic magnifiers. The adjustment takes some time and is normally carried out in the following way: the position of the object on the sample holder or specimen plate is measured using an optical or electronic measuring device




Old Hindi Movie Dosti 1964 Download

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