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Theatres generally have a substantial number of hoists etc. for moving scenery during performances, but one never needs to use more than a proportion of them at any one time. The number of drive controllers provided can therefore be limited to the maximum number needed for simultaneous use, and these can be connected to the required set of hoists through a switching network. The paper gives an account...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.