€¦ · · 2014-09-12the pendulum goniometer. Leighton (12) in 1955 intro- duced a similar...
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€¦ · · 2014-09-12the pendulum goniometer. Leighton (12) in 1955 intro- duced a similar instrument (Leighton flexometer), ... (motion is compound and complex) at both ends of
