正螺面 right helicoid
螺面角 [机] angle of thread
鹦鹉螺面盆 Ammonite Washbasin
螺旋面 [数] helicoidal surface ; Fusilli ; helical surface ; helicoid
面板螺丝 PANEL FASTENERS ; faceplate screw
螺纹面 flank of thread ; flat of thread ; Fusilli
平面华司螺帽 FLAT WASER NUTS
螺旋面的 helicoidal
球面渐开螺旋面 Spherical involute helicoid ; Spherical involute ; helicoid
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