Regulating systems (balances) with variable radius of gyration are allowed provided they comply with criteria One (A) and One (B).
Regulating systems (balances) with variable radius of gyration are allowed provided they comply with criteria One (A) and One (B).
带动摆轮旋转的摆碟、调校等时节拍的结构和快慢针等机制及其零件，都必须达到法则1A和1B的要求。