| http://www.w3.org/ns/prov#value | - ???linear displacement??? means the change of distance between the measuring probe and the measured object.Angular displacement measuring instruments having an ???angular position deviation??? equal to or better (less) than 0.00025??; Note: Item 4-1.B.3.c. does not control optical instruments, such as autocollimators, using collimated light (e.g., laser light) to detect angular displacement of a m
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