| 摘要 |
An essentially ring shaped member such as a stop ring is formed of an elastic material and has a gap at one section thereof. A removable spacer having a handle is disposed in the gap so as to expand the diameter of the ring shaped member. Removal of the spacer causes the elastic member to resiliently return to a condition in which its diameter is decreased. This arrangement facilitates fast and easy installation of the ring shaped member into an annular or in some cases helical groove formed in a cylindrical member.
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