直径平均直径119.70119.70119.70119.70119.70128.20136.70一根螺旋筋长度(cm)周长顶圈渐变段加密段中圈加密段渐变段底圈376.05376.05376.05376.05376.002.729.46圈数10301030141中部破数圈数螺距10.0010.0020.0010.0010.00141412.58141412.58141412.58141412.58162209.3232802.47100.00100.00400.00100.00100.00141512.58141512.58141812.58141512.58162309.32376.18376.18376.58376.18402.88376.050.0011285.453765.8011285.4550.27429.46
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