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