| 摘要 |
A socket for a ratchet wrench includes a polygonal recess defined longitudinally therein by at least six side surfaces and corners, a first protrusion and a second protrusion being alternately extending radially from any two adjacent side surfaces defining the polygonal recess, the first protrusion having a notch defined therein which is defined by two edges with different rates of slope, the second protrusion being structured symmetrically to the first protrusion and the first notch about a bisector of the corner located between the first protrusion and the second protrusion.
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