| http://www.w3.org/ns/prov#value | - With respect to the various parts of the human body such as the circulatory system including the limbs, head, dental section, chest, heart, etc. and the digestive system which have heretofore constituted the general subjects of the X-ray photography, the object of such photography has been fully attained by means of an X-ray tube having the aforesaid tungsten target and by selecting proper photogr
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