Fig. 7 Positioning of the suction tube
templates on the steel sheeting for
marking and cutting (Segments 0-1 to 4-
5)
Fig. 8 Positioning of the suction
tube templates on the steel
sheeting for marking and cutting
(Segments 5-6 and 6-7; the
segments of the upper part are
segments of the spiral
Fig. 9 Positioning of the 0'-0 suction tube
template on the steel sheeting for
marking and cutting