... (upper thread driver card),ms21(stepping motor driver),EF119(Needle position card),E871/E874(coiling signal transfer card) etc(4):dahao ... ,PW11,PW17,PW17A,EF108(6):Dahao needle position detecting board: ZWB(7): dahao needle position encode board:DXYMB-9,EF104B,EF119A,EF133A ...