| 摘要 |
A structure having a close-fitting opening for freely receiving a shaft is secured to the shaft, usually for rotation therewith, by attachment, as by bolting, to a securement plate that has an opening therethrough with a main shaft-receiving portion and an auxiliary portion, the latter being extended laterally from the main portion and defined by respective rectilinear rail formations which intercept the main portion of the opening and have been slid into and snugly received by respective grooves provided in diametrically opposite sides of the shaft.
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