| 摘要 |
PURPOSE:To upgrade spinning efficiency significantly by enabling the maximizing of a tension ratio of main to cross strings. CONSTITUTION:A string stretching portion 11 of a frame is formed in a ring with a vertical width (W1) of a strings stretching surface ranging 320mm-390mm and a horizontal width (W2) thereof ranging 200mm-240mm. Compression rigidity of main strings G1 in the direction of stretching is set in a range of 30kgf/ mm-200kgf/mm. |
