chronograph wheel friction 计时器轮摩擦片

wheel friction loss 叶轮摩擦损失

hour wheel friction spring 时轮摩擦簧

rubber-wheel friction drive 胶轮磨擦传动

click wheel friction spring 棘爪轮摩擦簧

unlocking wheel friction spring 释放轮磨擦簧

additional hour wheel friction spring 附加时轮摩擦簧

anti-friction wheel 减摩轮

bevel friction wheel 锥形磨擦轮 ; 斜磨擦轮

disc friction wheel 圆盘摩擦轮