双圆弧弧齿锥齿轮
double circular arced spiral bevel gear
double circular arc profile spiral bevel gear
双圆弧弧齿锥齿轮传动
Double circular arc profile bevel gears
圆弧圆柱蜗杆
circle arc cylindrical worm screw
hollow flank worm
灯光能见度弧度
arc of visibility of light
RCM接收信号强度指示与切圆圆心混合定位算法
RCM RSSI and Circle centre Mixed localization