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with each other always by the link / g. The mechanism is
that known as a drag-link coupling. The arms or cranks d e
and a h revolve with a varying velocity ratio which can be
Fig. 24.
\
ascertained for each particular position from the corresponding radii of the centroids. If we imagine, for instance, the centroids shown in Fig. 22 to be fixed to the arms to which they belong,
