| 摘要 |
Connectors for connecting preformed concrete panels, which connectors have doubletee flanges extending from a center flange, forming a U shape, with the flanges twisted at their ends an angle of 90 degrees from the center, forming a curved surface between the ends and the center flange, the connectors carried in and having the center flanges flush with the sides of the panels, each center flange meeting a like center flange in an adjoining panel, with the center flanges welded together to connect the concrete panels.
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