| 摘要 |
A pair of curved arms attached to a body form an annular seat for holding a first diameter rebar, a slot through the outer diameter of the body forms a radially inward pathway to the seat for rebar, the apex of a convex bar attached to the body is yieldable radially outward to pressure of a second, larger diameter rebar in the seat and is not significantly moved by the first diameter rebar when the smaller diameter first diameter rebar is in the seat. The seat springally grips either diameter rebar.
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