肋纹

  • 网络Rib pattern;costa;rib mark
肋纹肋纹
  1. 绕着螺丝的凸起的螺旋状的肋纹。一根绳子缠在螺旋桨上了。

    The raised helical rib going around a screw . A piece of string has twisted round the propeller .