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The timeslot recorded by rotating front-ring

Timeslot time-keeping illustration of rotating front-ring


As shown in Figure 7.2, someone departs at 10:10 and go to the bus stop on foot. The time-keeping location "60" is aligned to the minute hand at the time of departure;

As shown in Figure 7.3, someone arrives at the bus stop at 10:35, the front-ring scale value indicated by minute hand is 25, and it takes 25 minutes to walk to the bus stop. As to the fuzzy scale type front ring, it is indirectly obtained by the number of minutes during the section from front-ring starting point to terminal point. 

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