Apparatus or creating a swirling flow of fluid comprises a transmission base with an internal cavity to receive the fluid flow from outside via a side penetrable hole which the longitudinal inner surface of the transmission base will be in shape of slope of continuous line, or slope of line intervals with different degree of slope, or slope of line intervals with at least one bending angle or slope of curve either convex curve or concave curve with at least one curvature to increase or decrease acceleration of swirling flow along the longitudinal internal cavity and in the manner of a laminar swirling flow. And beside the side penetrable hole will become a side hole edge for regulating the flow of fluid to flow inside the transmission base in the manner of a laminar swirling flow in the internal cavity of transmission base which a part of the hole side edge can have an elevated insert shoulder for stacking the attachment to overlay on the insert supporting shoulder of another transmission base stack them higher.