| http://www.w3.org/ns/prov#value | - aratus, the block 6 is bent in a plane perpendicular to the surface of a slit 2 whichconstitutes a part of the block 6, that is, bent and fixed in the direction of thickness of the block 6.FIG. 4 shows a method of similar machining with a linearly reciprocating grind-stone 12, in which the block 6 is bent in the plane including the surface of the slit 2, that is, bent and fixed in the direction of
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