Standing Part and Primary Arc make a hook in Hitches and Bends of the most rigid part of the rope (because is most loaded) and the linear input force persists linear, even into arcs.  This gives the best Nip at top of Host opposing pull, the 2/1 in a pulley pull (that is not in same size arc in radial fed round Binding).
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<span class="int-own-work" lang="en">Own work</span>