Repeat customers are a sign that you’re doing something right, according to George Jolly, National Sales Manager at Werner Pumps, leading local manufacturer of high-pressure jetting and vacuuming ...

Department of Physics, University of Warwick, Coventry CV4 7AL, U.K. Warwick Centre for Predictive Modelling, School of Engineering, University of Warwick, Coventry CV4 7AL, U.K. You are free to share ...