| 摘要 |
A hard plastic cylinder 5/8 inch in diameter and 3/4 inch long is freely rotatably mounted in a semi-cylindrical recess provided centrally in the upper surface of a 2 x 4 x 1/16 inch rigid sheet plastic carriage. Line anchoring notches are provided in the carriage ends and sides and a loop receiving slot is formed axially in the recess bottom with circumferential loop anchoring recesses at its ends.
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