What are the screws of old clocks and watches in the Republic of China?

The screws of old clocks and watches in the Republic of China are the same word. According to relevant data, the screws of old watches and clocks in the Republic of China are precision screws, and the reason why they are all straight screws is determined by the processing method of old watches and clocks in the Republic of China. The precision screws of old watches and clocks in the Republic of China were turned, so it was relatively simple to naturally process the heads. If you want to process the cross, the cost is high, and turning the cross is impossible.