... fire”.The whole firing system has 9 districts“A,B,C…I”. And there are 10 channels in each district. So ... cables switches and all the buttons from “A…to I”.Turn on the “Rapid switch”and then adjust the ... the sequential fire—For example, to make districts“A,D,I”to do sequential fire .First, adjust the sequential time, ... and then turn on the districts“A,D,I”,make sure the rest are off. And then press ...