Apparatus for measuring the straightness of travel of a movable member
作者： John H Whitmore
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lens.org 参考文章(4)
Ludwig W Blau, Whitman D Mounce, Method and apparatus for measuring small displacements ,(1930)
Buisson Pierre, System for measuring small displacements of a body along three coordinate axes ,(1954)
Allen Albert, Method and means for measuring and indicating properties of conductors ,(1931)
Horeth John Martin, Seismic trace translation ,(1960)