More particularly, the disclosure relates to X ray generating devices and X ray exposure apparatus in which {HEAD ~ various components} provided in a vacuum chamber housing the X ray generating device can be replaced easily for {TAIL ~ maintenance} and other purposes 
More particularly , the disclosure relates to X ray generating devices and X ray exposure apparatus in which { HEAD ~ various components } provided in a vacuum chamber housing the X ray generating device can be replaced easily for { TAIL ~ maintenance } and other purposes
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