Of course, the weight in one of the pans would be the same for all stations, and the weight in the other pan must be changed each time."
(the weight in one of the pans; would be; the same for all stations) (the weight in the other pan; must be changed; T:each time)
the weight in one of the pans the weight in the other pan
would be must be changed
the same for all stations
T:each time