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Short Retraction Notice    The paper does not meet the standards of "Open Journal of Fluid Dynamics". This article has been retracted to straighten the academic record. In making this decision the Editorial Board follows COPE's Retraction Guidelines. Aim is to promote the circulation of scientific research by offering an ideal research publication platform with due consideration of internationally accepted standards on publication ethics. The Editorial Board would like to extend its sincere apologies for any inconvenience this retraction may have caused.    Editor guiding this retraction: Prof. Heuy Dong Kim (EiC, OJFD)    The full retraction notice in PDF is preceding the original paper which is marked "RETRACTED".

Simple Estimated Formula of Delay Time of Measurement Pressure Using a Pressure Guide Tube Connected with Different Diameter Tubes