drilling electrical discharging laser emission and the like the elongated ejecting vents may have a width ranging from 0 03 to 0 1 mm the multi vent nozzle 60 in fig2 may be used in the same manner as depicted in fig1 when a predetermined amount of the fluid agent is supplied through the communicating vessels 66 a and 66 b the fluid agent thoroughly fills the elongate ejecting vents 64 a and 64 b and then pours out of the vents 64 a and 64 b down on the target area in the work piece till a predetermined height of a deposit stickily lies in shape of a pair of square brackets 68 a and 68 b although the prior art nozzles often encounter choking on the fluid agent containing electrically conductive micro particles of substances such as silver the elongate ejecting vents 64 a and 64 b eliminate the problem with applying such a suspension agent by the nozzle fig3 illustrates a third embodiment of the multi vent nozzle denoted by a reference numeral 80 a casing block 80 c and an inlet unit 80 a are configured relative to each other in the same manner as their counterparts are in fig1 in the center of a lower side of the casing block 80 c of the multi vent nozzle 80 a rectangular raised portion 82 is formed in the periphery of a distal end surface 82 a of the raised portion 82 a pair of elongate ejection vents 84 a and 84 b are defined in shape of square brackets and have their respective one ends connected with communicating vessels 86 a and 86 b.