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Summary:An assembly of arm structure includes a base body, an arm body, and a plurality of sliding blocks. The arm body movably disposes on the base body. These sliding blocks are disposed between the arm body and the base body. The arm body has a convex part and a concave part opposite to the convex part. The convex part has a top surface far away from the convex part. One of these sliding blocks is disposed on the top surface. The concave part has two inner wall surfaces facing to each other and a bottom surface between these two inner wall surfaces. There is an obtuse angle between each inner wall surface and the bottom surface. Two of these sliding blocks are disposed on these two inner wall surfaces.
Bibliography:Application Number: TW20120138825